Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef7428d55b5d84f…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 09:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 470652d1b6ec68e335c49fc54bb0324a SHA-1: ec9b6f72021c651090fc011aae508e1848c00a34 SHA-256: 8ef7428d55b5d84f07c57ec7936d65b2ce263ba25dc1509e470e7ddc9ca2f7f7
194 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.ru/pify?keyword=buying+behaviour+of+customers+pdf. The document body contains garbled text but also includes the same URLs, reinforcing the finding of a link farm. The presence of numerous links, including one pointing to a known malicious redirector, indicates an attempt to lure users to potentially harmful sites.

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=buying+behaviour+of+customers+pdf In PDF document text
    • http://files.shopcompassrose.com/uploads/1/3/1/4/131438248/lizofaboxa.pdfIn PDF document text
    • http://files.owyheeoffroadchallenge.com/uploads/1/3/2/7/132740659/8414697.pdfIn PDF document text
    • http://files.thecheekyparlor.com/uploads/1/3/1/3/131383772/2705247.pdfIn PDF document text
    • http://files.writinglifebarbaraoneil.com/uploads/1/3/1/1/131164488/nenefubiwurabuwawo.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/1/0433/2303/1720/files/kilekitusumomidazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/abirami_anthathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/zuloje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/6365595640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/miloganukixeroxataneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/vedudesarizebure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/fisitubipabijuwewakiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0316/2269/files/cistoadenocarcinoma_seroso_papilar_de_ovario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/pofitiluwepifom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/73025437471.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_off0000686d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 5888 bytes
SHA-256: 70b99b2993304f75b5581a0e9c98bc152ef26f67233682f731eb1fcb1dbd765d
font_01_sfnt_off00007c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C62 10260 bytes
SHA-256: 180ed550bbd3cd7b4a2d539b2f775f2963ebd40a853fb5d4dee6592af163709b

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