Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd25f83ded4cc32…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 01:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b46f907bfc9077695f470062c3c6803c SHA-1: 673802a74d442b270c31722a5fb700401eec6ef3 SHA-256: acd25f83ded4cc324df6835f92d3719dad07738b07101e8c6d3d42cca0793040
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with a seemingly benign keyword. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely to obscure the malicious destination. The ML classifier also strongly flagged this PDF. The document body contains garbled text but includes the malicious URL and several other URLs, some of which are hosted on potentially suspicious domains.

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=problem+solving+therapy+worksheets+pdf In PDF document text
    • http://files.fleacircusoz.com/uploads/1/3/0/8/130874598/8147516.pdfIn PDF document text
    • http://sogawav.notestotheunderground.com/uploads/1/3/1/4/131437812/rulid-jivosibogulanez.pdfIn PDF document text
    • http://files.tarasullivanphotography.com/uploads/1/3/2/6/132682655/sopimujomeko.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/1/0438/5128/4642/files/tabasolofumuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/nofofuxizelurewogopija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/79274124661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/function_of_rough_endoplasmic_reticulum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2050/1660/files/3m_mission_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/58587470787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/kuvakamowux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/risijugurosudituravol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/38664727521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/after_you_ve_gone_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/wirikefevaduxajugojabat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/58632088782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/67202665327.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 3

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_off000068f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F0 5912 bytes
SHA-256: e9fc2077a9ef28efb4595dc0174e60fe8be209c26b9bc754636db1519b93f520
font_01_sfnt_off00007cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFF 10024 bytes
SHA-256: b20716de8af07804821ef8f1ff5708c805cdf70134654b81f8a1a7e18edbe455

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