Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59bf92010b2efa8…

MALICIOUS

PDF

43.9 KB Created: 2020-08-08 10:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce37250a9d61e3b6eaeb16f365d30e48 SHA-1: 5d335aa12171caf1118fc90cd88c7317ba5c2c46 SHA-256: a59bf92010b2efa8b8a2c1ba4b76458ac7549e95226eda2f37f8e87be0419871
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to a redirector infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=alarm+check+valve+working+principle+pdf, which is flagged as malicious. The document's structure suggests it is part of an SEO link farm designed to distribute malicious content, likely leading to further compromise.

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=alarm+check+valve+working+principle+pdf In PDF document text
    • http://files.focalpointproject.org/uploads/1/3/1/4/131484029/dudizatepog_bowuvolurun_pamunume_vinur.pdfIn PDF document text
    • http://files.crowandcrown.ca/uploads/1/3/1/4/131438098/galegajavi-giduxolosaben-ruxizutogozat.pdfIn PDF document text
    • http://files.spiritualcollectiveproject.com/uploads/1/3/2/7/132740405/adb7945bc266.pdfIn PDF document text
    • http://files.lesliecarpenterholtphotographer.com/uploads/1/3/1/6/131637308/wurafe-resamupuvivij-tolimidefepupoz-menajijav.pdfIn PDF document text
    • http://files.aayfitnessandyogabyjamie-dee.com/uploads/1/3/1/3/131398605/3447536.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/1/0435/6859/5112/files/25314465777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/zobigebiguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/68643452689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/belowisimexoxowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/67474715509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0951/5425/files/feveru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7977/8979/files/36210583607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/36516789172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/nimukiguwogivev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/motitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/sepexawamugojixegigazepaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/99667957064.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
🗂 Part of campaign: empressreadings.com 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4E 5596 bytes
SHA-256: e02b74ee7c0070c8c5953cfb4a9377197ccc09a983e0795813e40a3d6a6099cd
font_01_sfnt_off00008048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8048 10008 bytes
SHA-256: c9a6a222ee8913118815625f73bebe4a5b143f8daaaaebd8350424805843ce97