Malicious PDF — malware analysis report

Static analysis result for SHA-256 b406a6a1043906bd…

MALICIOUS

PDF

44.2 KB Created: 2020-08-18 21:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8fc1444f85c328f28f8cb3526df5f983 SHA-1: 4fefa9ef68c9f1d50c1cbe3152686e9af30af98b SHA-256: b406a6a1043906bd56d3ccdee66a72b85656ac49486a661fbe25f8da54657239
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=online+cv+making+format' which is flagged as malicious. Additionally, a PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0434/7514/0761/files/ontological_contextual_approach_to_teaching.pdf'. The overall pattern suggests a phishing or redirection attack.

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=online+cv+making+format In PDF document text
    • http://files.bdbooms.com/uploads/1/3/0/7/130738662/zutidivej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/ontological_contextual_approach_to_teaching.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4633/7703/files/konokexijiwalukusofilav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/atharva_veda_in_english_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/3281139997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/classifying_numbers_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/alkaloid_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/gixofeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/concrete_form_stakes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/82058279809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/febet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/mental_illness_symptoms_checklist.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 4960 bytes
SHA-256: aadeafa057a9a5b9bfd72e596af18375c72653af6d239fddc8dbd9b0f3f8ae9d
font_01_sfnt_off00007263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10580 bytes
SHA-256: a86da30db2d34b9fa0c3724a7fb63c3172e004718e904e6bd93944e0c36861ba
font_02_sfnt_off0000967d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x967D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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