Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac20040c1bf188c…

MALICIOUS

PDF

51.6 KB Created: 2020-08-17 13:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fca34124b98d8f946c7acb847738e946 SHA-1: 4fb74e12ac3f58d1651197086c86635b8f8dab83 SHA-256: bac20040c1bf188cc57edde4fa4c6e241ca0b868996fef131cb17ba1dc03a37f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The document body contains the same malicious URL, reinforcing the intent to redirect the user.

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=bal+ganesh+2+telugu+naa+songs In PDF document text
    • http://files.totnessvintage.com/uploads/1/3/0/7/130776054/825182.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/1/0431/5650/4744/files/69801270454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8993/6025/files/prevencion_de_accidentes_laborales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/maslow_1954_hierarchy_of_needs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7018/3831/files/28640080929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/cgp_functional_skills_maths_level_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6960/9886/files/59891713396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0571/7141/files/72109714020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/two_room_and_a_boom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/active_listening_skills_handout.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: rempahdapur.shop 3 samples

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E6 5032 bytes
SHA-256: 8e8b4eb09a8f8a35962f61805eb884e1c3e80cba8eadc55d133dce3f87192673
font_01_sfnt_off00009609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 13736 bytes
SHA-256: 15d60d5d4ce52b4eb8140cbc38dd9ae7994b47d92f6a2bcf18945d6f1ea682b1

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