Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fe1408ac3f0b23…

MALICIOUS

PDF

34.8 KB Created: 2020-08-26 15:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6611c8a4553e4e1aa74fe191953df7b1 SHA-1: d2936dd51d0a19655473c3b74311aca0ee5f973e SHA-256: 01fe1408ac3f0b23eee1299f7811d67a8b75ea9062e344c43d903d61d8e3f35c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary malicious redirector identified as https://ttraff.ru/pify?keyword=algebra+1+sol+review. The heuristic PDF_SEO_LINK_FARM indicates a link farm structure, with the first URL pointing to a Shopify domain. The ML classifier strongly flagged this PDF as malicious, suggesting a sophisticated attempt to drive traffic to malicious 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://ttraff.ru/pify?keyword=algebra+1+sol+review
    • http://jetofaz.tehla-jane.com/uploads/1/3/1/6/131636612/b1f85.pdf
    • http://files.ousdcharters.net/uploads/1/3/1/3/131381553/karesefosolola_towapunudora_bedeko_morisuko.pdf
    • http://files.herdiselmend.com/uploads/1/3/0/7/130740123/wopunobixuxej-punilawi-pexoni-piwexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7973/6223/files/nuzek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/17892168862.pdf
    • https://cdn.shopify.com/s/files/1/0459/5456/4255/files/52070241141.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/zedabuxozusavudoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/sathi_bengali_movie_hd_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/19890128278.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/fakazamuzufaxilamipivife.pdf
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/nemo_full_movie_free_download_in_tam.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/52335022812.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/pharmacy_personal_statement_examples.pdf
    • https://cdn.shopify.com/s/files/1/0447/7632/5286/files/alicization_rising_steel_reroll_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/bijerejem.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_off00004c5c.bin
dc0e7656478ba4cde5e9c7a3af6ba6a644501e631eab90b49e35cd0e92386122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C5C 5184 bytes
font_01_sfnt_off00005e2c.bin
65cb439fa02e320245d4656075c2c0da7415225fef4d8c4a658d0134e3d25804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2C 9480 bytes

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