Malicious PDF — malware analysis report

Static analysis result for SHA-256 844847406bd01c65…

MALICIOUS

PDF

42.7 KB Created: 2020-08-22 19:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74a8b35e50b31400418a7040927d66aa SHA-1: a854dfeb5adf8d0e4deddd9b51b8458ba874f24d SHA-256: 844847406bd01c651fc1ef9269dc931c94132ee6ebec8c26100c5754a09518e5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body and heuristics suggest a lure for a 'free download' to entice users to click the malicious link. The presence of numerous external links, including a link farm, further supports the malicious intent.

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=purpose+driven+life+journal+free In PDF document text
    • http://zafake.bettereatingcoach.com/uploads/1/3/1/4/131438477/damutozigiba-kukuno.pdfIn PDF document text
    • http://xufadozi.uccellos.com/uploads/1/3/2/8/132814930/nipuwozovixinifad.pdfIn PDF document text
    • http://xodexamu.ladyannestrunkomaha.com/uploads/1/3/0/7/130775350/kotepanigumubelafu.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/1/0428/9835/8432/files/vuxopikuxoxixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1887/7085/files/embryologie_de_l_appareil_gnital_fminin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/13128132268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/risenuwowadoveki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/prefixes_suffixes_worksheet_exercises_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/virufirakoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3139/5493/files/kawopasinejevoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1055/5047/files/12137120859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8311/1336/files/geladeira_brastemp_ative_manual.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
🗂 Part of campaign: worldyouthpeaceforum.com 3 samples

Related samples 2

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_off0000678a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678A 5172 bytes
SHA-256: b2ef61bee469d4dcef16059fc0bb0c875e58e15bcfb26e4de6716206379434fb
font_01_sfnt_off0000793a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 10400 bytes
SHA-256: c0e11f106b0b729057b1229a8152dfc89124a97a6a86d0d881f0f32b9490fdfc

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