Malicious PDF — malware analysis report

Static analysis result for SHA-256 122268a91ceaed75…

MALICIOUS

PDF

40.9 KB Created: 2020-08-22 00:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b39731e6104ecd83a242945012bd2728 SHA-1: 6fa54a65f9b96c4fc4c3ade33e999e55c634a1d9 SHA-256: 122268a91ceaed75fa728037556b67257e46d20ca6238412ec5aa8b1ad3ce4e9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL "https://ttraff.com/pify?keyword=hey+jude+piano+sheet+pdf", indicating a lure to potentially malicious content.

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://ttraff.com/pify?keyword=hey+jude+piano+sheet+pdf
    • http://files.nolanlee.com/uploads/1/3/1/3/131383580/8340459.pdf
    • http://zogupo.carolinasiscebs.com/uploads/1/3/1/3/131380349/2011631.pdf
    • http://files.crazycurrchic.com/uploads/1/3/1/4/131483025/zevesomeb_tugagekupore.pdf
    • http://files.hockeyaustralia.net/uploads/1/3/1/4/131437464/8195179.pdf
    • http://gixunojo.tremontsports.com/uploads/1/3/0/7/130739553/98173.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/misery_loves_company_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/roxasebavepolimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/gudij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0464/7200/3734/files/rixixiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/marriott_employee_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/vesukupebipuwedekegerop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/vizorufirupotane.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055e0.bin
24b03ef8335850ccaadf403b364421a034b65aa29f46021b45e737395f9358f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x55E0 5020 bytes
font_01_sfnt_off000066fa.bin
6ca6b329b26a8ef27ce40abf2d8926edbc613d5392c85cf54fcad7f82a1b509d
pdf-font-stream PDF embedded font (sfnt) at offset 0x66FA 9984 bytes
font_02_sfnt_off00008907.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8907 4324 bytes