Malicious PDF — malware analysis report

Static analysis result for SHA-256 1131e5aa2ccf99da…

MALICIOUS

PDF

48.5 KB Created: 2020-09-07 03:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea61f8898d994a6f2f52fe1e9146ab8 SHA-1: 2a4e2697c5062df508596ebbc26c115761c3e859 SHA-256: 1131e5aa2ccf99da913f3a96f6b9a0a7a6b8bb7fa36dc20e473eda4e4c4b3850
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for game cheats. The primary malicious indicator is the PDF_MALICIOUS_REDIRECTOR_LINK heuristic, which flags the link to 'ttraff.link' as malicious. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely to obscure the malicious redirector.

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.link/wix?keyword=cheat+assoluto+racing+android+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/wakilipabufekov.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/69996932361.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/zegofolegipetuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/esc_hypertension_guidelines_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0452/1289/3344/files/texas_dental_jurisprudence_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/turn_off_mouse_acceleration.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/874789151.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/53329007141.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/sobomasipezitarojabe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/siwotixoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/1147/3571/files/murikefufejujurabiwedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/philippine_medical_technology_laws_and_bioethics.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6471/files/upsc_ansar_shaikh_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4308/files/soft_skills_communication.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064eb.bin
b1bfd4b3e88bd065ce8d4ede85bfb4d81232d93921243885a73f6aeff61f2723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EB 5160 bytes
font_01_sfnt_off0000766a.bin
fcf6b59ccfe78e47fa899542d6ea9fdf0c061dfea8d2594f77d6d8c1ed2101c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766A 12900 bytes
font_02_sfnt_off00009fe0.bin
9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE0 16160 bytes

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