Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a20f1b2e288de8c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 20:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8863c5a2989a1117d6aedaabb40904f SHA-1: cc93135f78e640904f53962095c09ebe35e9a7b4 SHA-256: 5a20f1b2e288de8cd85f14f7a3b77f959b526a67669642a63b41c9d8e493a083
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning technique designed to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains the target URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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/wb?keyword=assyrian%20and%20babylonian%20chronicles%20pdf In PDF document text
    • http://files.thewordwashing.com/uploads/1/3/1/3/131381640/pemevavuxagarig.pdfIn PDF document text
    • http://files.hello-baby-toys.com/uploads/1/3/1/4/131453807/4352687.pdfIn PDF document text
    • http://files.aklcbc.org/uploads/1/3/1/4/131408256/76682d60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/santana_smooth_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/63771061978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/pumikigijika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/vimeo_balto_bob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/mitsubishi_maintenance_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/21331846861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/zerutibozuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/20152585299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/zevagabuwewoludate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/bodybuilding_mass_program.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000580b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580B 5184 bytes
SHA-256: 1ac1048dc90ab9186b0d4b92a9f572e2db3b6b4b7b8c54a3230efa27c84de456
font_01_sfnt_off0000698f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698F 10268 bytes
SHA-256: 51d9836b3eab047c14f3218f5c07680b5c0d6c90eaa0375d7c6224a37f787c1d
font_02_sfnt_off00008c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C51 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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