Malicious PDF — malware analysis report

Static analysis result for SHA-256 9affc7e4dd5f9b04…

MALICIOUS

PDF

37.2 KB Created: 2020-08-12 11:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39bf224d74abac732251a2873085f7c6 SHA-1: 33dc41e5c8aa3b77f040335a2e54c758b102c31d SHA-256: 9affc7e4dd5f9b0499a45cbbabc8311dc838c79d7301e1c48ec3f7cd45b2eaeb
194 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document appears to be a link farm, likely designed to lure users into clicking through 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.com/pify?keyword=aphasiology+disorders+and+clinical+practice+pdf In PDF document text
    • http://files.brucealvesiii.com/uploads/1/3/1/3/131384293/gaxotufumotubu-gofoxivugerupu-tipamunate-rebizefisovodaj.pdfIn PDF document text
    • http://lirofeziv.prefactortech.com/uploads/1/3/0/7/130776647/5116365.pdfIn PDF document text
    • http://files.bahiavistachurch.org/uploads/1/3/0/9/130969469/nazosira.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/1/0433/8191/5804/files/problem_statement_thesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/ca_ipcc_new_syllabus_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/45093194107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/20772207340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3870/1728/files/oblivion_realistic_leveling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/dowukixakuraluxenun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bolosenisom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6068/2139/files/benzodiacepinas_anestesiologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/1-_99_thieving_guide_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2113/1161/files/transparent_background_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/41930629532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6995/4453/files/wosetametelijapimoxejupur.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 3

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_off0000533a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x533A 5508 bytes
SHA-256: 12d99ddf73d1c62629aae304091aefa426a3670b2c93ef8e32ab51a34b5a7e87
font_01_sfnt_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 9968 bytes
SHA-256: 96fd96611f0a6f41a004adb0da3f3c7436138618bc1977c8fae616429c3a14e0

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