Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd08c1db7e1dd160…

MALICIOUS

PDF

45.0 KB Created: 2020-10-28 17:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 318ba7886ba37700eaf2df2b9d7f0b46 SHA-1: b3bb89124167a5dbbaa79092de919c4755349a1e SHA-256: cd08c1db7e1dd160d13736af224eabad7170a6bad685fc1294deaff2ad336ab1
194 Risk Score

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://ggtraff.ru/123?keyword=ina+garten+making+chicken+stock In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8ca4e7a9ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5f8eaeca0c007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8f427dd0109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/44479319271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/bad_value_proposition_design.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/xivoxevafokimebusinogim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/56468518579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/xupigigividamem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7796/9069/files/dupuvuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2572/6102/files/sure_grip_hand_controls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9084/4084/files/zarabaterigeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9183/6572/files/50384533637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6941/7888/files/22881158590.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/dk_illustrated_oxford_dictionary_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7930/9723/files/zemeriko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/bullish_and_bearish_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/lelerawaberizajexev.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/58476783709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4153/3347/files/93423864872.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/black_magic_in_kannada.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 5184 bytes
SHA-256: fa5e93b60d9c0128cf15422355fd96b85653e0e8f60dba26848d53df70bd6f51
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 10920 bytes
SHA-256: 9c78414084324a599deaead00503d1ad0d9280cbc57f0e0548f305a17bde824e