Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc63d3a244910a8…

MALICIOUS

PDF

37.2 KB Created: 2020-08-06 06:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f188f463303287e4d89492d5b26b8a32 SHA-1: 37b5757aab8230b5d230ee833bcf880528ab3190 SHA-256: afc63d3a244910a8b541357abb4a31a0165c2ebaf306ea441d8a4cc84d68706a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body and embedded links suggest a lure to download a 'biological science' PDF, which is a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

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=biological+science+freeman+pdf+free+download In PDF document text
    • http://files.festivalontheave.org/uploads/1/3/2/7/132740234/suvavasiperegakupato.pdfIn PDF document text
    • http://files.risehairinc.com/uploads/1/3/0/7/130738845/5caaba53c.pdfIn PDF document text
    • http://files.andreabrewtonphotography.com/uploads/1/3/2/8/132814476/e1438a.pdfIn PDF document text
    • http://files.leonkew.com/uploads/1/3/0/7/130775659/71bdc2c59d.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/1/0432/3108/4708/files/kikijoterososa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/japejibup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/zoviguget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/42273017375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/99094437441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/sazuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7094/6456/files/85156813294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/15819638416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/if_you_only_knew_shinedown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/87197239230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/walinazavivuzuzil.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_off0000503c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503C 5616 bytes
SHA-256: b901f06a8902f96c1cd2e4dd8b83f5e964ba6a4cd9dfa0f7dddad1f9a8298eee
font_01_sfnt_off00006358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6358 10588 bytes
SHA-256: cd45a1da896a3b01bf7304c19af844a3650faeedb638dd603b813f8c613b7e13

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