Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f42da45035c7e2…

MALICIOUS

PDF

48.8 KB Created: 2020-08-22 19:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1cfbca9195362534e1997c56136a726e SHA-1: 24b20bbb51450d570b37823ffc3f75424baa404b SHA-256: c5f42da45035c7e23675fc2b71d47056060e4769dbb66f421d08302a99334468
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a malicious URL, disguised as a 'Genie bra size guide'. This is further supported by heuristics indicating a malicious redirector and a link farm designed for SEO phishing. The ML classifier strongly flags this PDF as malicious, suggesting it's part of a phishing campaign.

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=genie+bra+size+guide In PDF document text
    • http://files.blwcenter.org/uploads/1/3/1/0/131070561/d954507.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/1/0430/6717/9165/files/vaccines_and_autoimmunity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/mechanisms_of_evolution_bioflix_tutorial_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9511/3125/files/56549058559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/learn_java_for_absolute_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5291/6119/files/43795995732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/87588465986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7946/2040/files/associer_deux_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/bv_ramana_engineering_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5202/2430/files/13600803798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/kepujodajeriluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0183/9517/files/sky_cinema_hits_uk_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/50894613776.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 7

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_off000081d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D5 5180 bytes
SHA-256: a044eeb2f69c19ea485ad3b6523c3490df3ae2b4fb0dac5dba6d25d38d166719
font_01_sfnt_off00009380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9380 10388 bytes
SHA-256: c9b63bd9ab0743611df29de20a25862376b720a0fa12ab09e19a859f89a06b6f

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