Malicious PDF — malware analysis report

Static analysis result for SHA-256 5389b88741795035…

MALICIOUS

PDF

41.4 KB Created: 2020-08-09 19:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 950141a3f2fd3bdba50d540d53b303fc SHA-1: ae2a77c32dfe97182ad8bc665b82dbb764b93f8b SHA-256: 5389b88741795035c8d2c7bc0efbc0ab58b71acae5b5a1c69bbf76cb1e88f586
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=discrete+mathematics+textbook+pdf, suggesting a lure to download a textbook. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous links, likely for SEO manipulation or to distribute the malicious payload across multiple domains. 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/pify?keyword=discrete+mathematics+textbook+pdf In PDF document text
    • http://files.aabmbass.com/uploads/1/3/2/8/132814972/kalar.pdfIn PDF document text
    • http://files.birthbygracemidwifery.com/uploads/1/3/0/7/130740483/6e0c9bf4.pdfIn PDF document text
    • http://files.suemediaproductions.com/uploads/1/3/2/6/132695543/wosinefivududojizaz.pdfIn PDF document text
    • http://wawenupum.midlandsallstar.com/uploads/1/3/2/6/132682646/suzedo.pdfIn PDF document text
    • http://files.drstevenjadlow.com/uploads/1/3/2/7/132710712/44c5392e2ad3bf7.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/1/0437/5432/4117/files/71886119290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/derelefiwizuwadup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3957/7496/files/pemumubanizenezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/895794923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/xamilufodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/woxaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/theory_of_computer_science_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/43307181509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/the_most_dangerous_game_anticipation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/rezaxesus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/xuwugir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000624c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 5636 bytes
SHA-256: 686fc644ff2ec750ca132c0e05f4d292fc33d2f6de6770f518d049841834b16a
font_01_sfnt_off00007547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7547 10428 bytes
SHA-256: 4d9eeccd95330a56f1bf1982a6bbc7622bb5c788dad1ad1b70ba1a4b36c832a3

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