Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3375a7b22f02bb6…

MALICIOUS

PDF

47.3 KB Created: 2020-08-18 22:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d288e954775876d5c6f6e8f320eb3aea SHA-1: 3ff160db56287b72f40a613f37d213242d0dbbf7 SHA-256: f3375a7b22f02bb668f9e40f2b28ab1a0bb62ea6f1c1c590f38f153d07248ca2
194 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated but contains the same URLs.

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=model+based+clustering+methods+pdf In PDF document text
    • http://ronatuj.meganlamart.com/uploads/1/3/2/6/132681352/695046.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/1/0429/5829/1093/files/39467403463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7930/6135/files/89556802988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0493/4818/files/fofepekubobitimibuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/zone_online_casino_msn_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/48917833664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/anastasis_hillsong_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/development_economics_debraj_ray_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7735/files/11869981079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/delel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/tamil_nursery_rhymes_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9269/5458/files/78046378473.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 5716 bytes
SHA-256: 13379e2bf03246240794397af1fde488673c8a85ac1a9ddcab2bb7794b8a600c
font_01_sfnt_off00008a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A10 11712 bytes
SHA-256: 5cfaeae391342ec6e1ba3f59d7d9ee7ee85d992de766c62658c4ec926f5698d9

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