Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1693d1b342582bc…

MALICIOUS

PDF

44.1 KB Created: 2020-10-17 19:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 80f8116e21810e95e0cf22cf596aae2c SHA-1: da7f31e3b44f869765ad0c3982a6866160d1c4c5 SHA-256: c1693d1b342582bc3f1d956c242e6f0f793ac9cfd5f74352469bc258e6aacdd9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a link farm, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Stargate SG-1 Unleashed APK OBB' and a URL that appears to be a lure for this content. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?keyword=stargate+sg+1+unleashed+apk+obb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8734f10c50b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f877872de557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f89805b5f080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f870ee18cdb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8ac9e95646d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f89d3ce456a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f87157227cbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f8920ca6e1fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86fa3f5f57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f87c6bc711e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f871e8672d3c.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/temiluf-renafelo.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/46342becd04fce3.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/8e3adde0-da01-4cf2-af05-237af82985f5/37415339841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4adea3b2-e42f-490e-adec-8ae1791cb1cb/giwevovodisolapuditimegav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fee4859-9bef-447b-892c-aafcc6d2d2b0/fararujulomemogal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6bfeeb-9fdf-445e-89b5-db44228b0fca/10901737729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2940/5108/files/download_final_fantasy_4_after_years_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9364/8294/files/21522338440.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_off00006d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 5580 bytes
SHA-256: cfc8a846966752de615b33297800460a6cc3fca72417d577c6cae3768e19b44d
font_01_sfnt_off00008066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8066 10256 bytes
SHA-256: 92ac6e73da21b04e12c8118f1b6d977b9162c38e9588e2ac2b487e2b896b58a2

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