Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad12618065fdfe3…

MALICIOUS

PDF

44.2 KB Created: 2020-08-23 18:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7386a705a1aac7eaf174c3566c1d4df SHA-1: 96869b248e8e1a8ef304baa6f9bfcc34d1cf45cf SHA-256: 9ad12618065fdfe37a8f1afbc1ad91b2d394c1fcd03cc94bff679d1dc6a14c59
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a malicious redirector and a link farm, with numerous embedded URLs. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=crossword+puzzles+with+answers+printable', which is flagged as a known malicious redirector. Additionally, the document contains a large number of links pointing to Shopify-hosted PDFs, likely part of an SEO spam campaign. The ML classifier strongly indicates maliciousness.

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=crossword+puzzles+with+answers+printable
    • http://files.megaworldglobal.com/uploads/1/3/1/4/131453294/sazimovu_vulezekoju_lebanufelezer_sikunus.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/batman_villain_joker_song.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/54552855215.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/32173632392.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/wajawisubivux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/87423649613.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7578/files/fafudedozagoda.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/rowisilufijoxejukes.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/the_transnational_capitalist_class.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/jojafogomoxo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e26.bin
8a0625314cf8d26fc4d29c68ce398d7733c54a2902c60fb28cf5f1c79b951831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E26 5232 bytes
font_01_sfnt_off00007ff6.bin
1fa64a99fa010d4545cd763d8e87ce3c42d488f2879100b864e9295cfd55da2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF6 10648 bytes

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