Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb69f66e5d1acaa8…

MALICIOUS

PDF

40.2 KB Created: 2020-07-31 07:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a918bfc7634ecd092d02113f0ff5547b SHA-1: 9438a484580eb62fe40bf56c7037ed7ac727f768 SHA-256: cb69f66e5d1acaa85eccf8a848b6c9b4a93206f9a04760cae44dd5f81cc63437
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a tactic often used to obscure malicious destinations and engage in SEO poisoning. One prominent link, 'https://ttraff.cc/pify?keyword=basic+chemistry+book+pdf+free+download', redirects to potentially harmful content, disguised as a free book download. The ML classifier strongly indicates maliciousness, supporting the assessment of a malicious redirector and link farm attack pattern.

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.cc/pify?keyword=basic+chemistry+book+pdf+free+download In PDF document text
    • http://files.solacevirtualtours.com/uploads/1/3/1/3/131380175/vusama_xasosa_mogibadusoves.pdfIn PDF document text
    • http://files.flaentertainmentinsider.com/uploads/1/3/0/7/130740464/2299659.pdfIn PDF document text
    • http://files.lakepointetower.com/uploads/1/3/0/8/130874647/togefi-tawisidobe-wifijipiduz-pedaburuluzad.pdfIn PDF document text
    • http://files.wasga.org/uploads/1/3/1/3/131380759/9674c991.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/1/0428/6903/1078/files/30144169371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7976/2073/files/makefimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/zefatebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/werolaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1923/8562/files/54063603498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6900/files/82413995586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/97556281072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/91820564600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/fewimavitigus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/1420155704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/zagotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/75277651446.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 6

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_off00005f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F10 5632 bytes
SHA-256: 2af11ab9a1b3fff864c1b8f787384cb17ed7c5c3989656f3c77dc1b27faab4ea
font_01_sfnt_off00007215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 9816 bytes
SHA-256: f51990d2d62b6d78550a5a792637f764d8c4b8b1a5bb6ac685dd75f1ffb8001a

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