Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f57a456a6859080…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 16:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee5921e21c0390c92e661c392e416c34 SHA-1: 9324f28de7fcd934bd45f0425a556f1c56510b87 SHA-256: 0f57a456a685908060b50715b168eec4a73134dd95c98da52148fdc2fbaaa36e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits a PDF link farm heuristic, embedding 19 external PDF links, many of which point to Shopify-hosted files. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.ru/pify?keyword=rindu+berat+camelia+malik' is the primary IOC, suggesting a phishing or SEO spam campaign.

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.ru/pify?keyword=rindu+berat+camelia+malik
    • http://files.wallacecarpentryinc.com/uploads/1/3/2/3/132303077/a11ff8d16f3c3.pdf
    • http://wuluvof.tuscanhenmarket.com/uploads/1/3/1/3/131380600/7da8dc554b7fc9e.pdf
    • http://files.project907.com/uploads/1/3/1/4/131453365/zupubebumi.pdf
    • http://files.bcarrollconsulting.com/uploads/1/3/0/7/130739340/sonuletewut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/mimesis_auerbach.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/kabusemuzopubajovikixude.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/mudubuxomuvakojizax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8946/files/school_calendar_2020_17_deped.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gokibaleginasesomedusuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/mipewerunesuwon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/73389577482.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/zeneji.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/ayurveda_books_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/99827680897.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/dukajodalamonewinimuviz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/xopow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/46419344500.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/waverod.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006323.bin
73a6cee3bdbee20938170cab628b165e26d803c499e8d790a013f126e6b5724e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 5120 bytes
font_01_sfnt_off00007465.bin
8c05ef2bec3dec126ec71129ad2290e495ab678810f1d1938e92abb0b3104748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7465 11356 bytes

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