Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b252441d2bcc1f…

MALICIOUS

PDF

58.8 KB Created: 2020-10-17 08:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b2f18f04d4e4ae3d0deca4020ee3b3e9 SHA-1: c14664b411c9d096657a49a59cf6fd882c4e1941 SHA-256: d2b252441d2bcc1f90ebaa91e5baeae9dc17e359c472e5a7a5331b38290e2ff8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to redirectors and SEO link farms, designed to trick users into downloading content. One prominent redirector URL is https://ttraff.club/123?keyword=neighbours+from+hell+2+android+apk, which is also flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/123?keyword=neighbours+from+hell+2+android+apk In PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/duzibol_tuvezim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f87007f2117c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f89c61ac5b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8757c73f949.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/zogemurerotogeb-lelimadanet-wiwuzop.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/e294ec93a97e0c.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/7009348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31b0480-a6b1-4390-882b-53edecaac25e/50839455489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086a7735-47cf-43a1-893c-442fd83a5867/vazukojimulatewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febba496-1efd-4089-82bf-f5e47480b80f/98460401947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/46546747507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9728/2977/files/the_black_cat_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2649/6667/files/3820400505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7119468-0343-4e40-96f3-72d4050627f9/kigemalatiluwetagon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e91ebe-a9dd-4575-b5b3-fa53296219c8/13828510313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6404446f-a8ec-4cff-ac23-fc4e737738d3/nobonufapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bca67a3-309e-4f86-889c-8d4cf591e05d/98286433914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79932300-7b33-4bdb-a909-ea56d28b4248/vujivuf.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAF 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00006d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D96 5760 bytes
SHA-256: 4117340327ba5539a9cc5e942bdc6e6f6ad00f97b1337c71bcf168e53b346ef7
font_02_sfnt_off000080fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FE 8672 bytes
SHA-256: 1dee540b0fc3a93d7064bd77273e87d0f32e60a9bf3adf872b9022ec0140e6d6
font_03_sfnt_off0000992a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992A 15880 bytes
SHA-256: 21392569b0f8b8d6b9ef5815cfbc8c9102aeecc91022f089ca4fa3d0775e0d1e
font_04_sfnt_off0000c420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC420 16760 bytes
SHA-256: bac09e02901132f1145a6909fc2b210863aec8ceb595acbeb8bc095342c48b4c

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