Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2e7ae8354fd3b8…

MALICIOUS

PDF

35.4 KB Created: 2020-08-14 21:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ed15867502a3359667669ffa1827584 SHA-1: 4718f74ce1a4197e7c1282965ee21be36329dfb2 SHA-256: 3a2e7ae8354fd3b8b976ab1d1dc75c26ca88c79b11dfe7218c1f9d54291abde1
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to external PDF files hosted on various domains. One URL, 'https://ttraff.ru/pify?keyword=chicken+rice+nutritional+information', is flagged as a malicious redirector. The presence of a large link farm suggests an attempt at SEO manipulation or distributing malicious content disguised as legitimate documents. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=chicken+rice+nutritional+information In PDF document text
    • http://files.room4love.org/uploads/1/3/0/8/130874458/koban_subozad_lalak_wifufup.pdfIn PDF document text
    • http://judat.artedelquarzo.com/uploads/1/3/0/7/130775189/1638242.pdfIn PDF document text
    • http://files.fsnh.org/uploads/1/3/1/4/131454034/78a8068511c1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/biology_practical_book_class_12_gseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4719/7594/files/1756625845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/ac_dc_big_balls_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3356/2010/files/theology_of_biblical_counseling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/sozawama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/75130164250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/92135688435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/95270188393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/7030/4935/files/motorola_h730_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/52590683703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/jumikujotenorolorazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4912/2983/files/guided_tours_of_australia_and_new_zealand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/8639111981.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5050 4912 bytes
SHA-256: 64b80ce552c55df13ae2ecf80d8efd69f1b43afa686416e5ed1c83ae43bab18a
font_01_sfnt_off000060ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CE 9392 bytes
SHA-256: 74133402163119e7681e6bf155a828ba80fc2182ee7d97e3f6c3bccc8945d262

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