Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f193e31e1e66cc…

MALICIOUS

PDF

46.2 KB Created: 2020-08-20 09:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ea0774778e1ba700e9b142e13e3821c SHA-1: d73516831fb06f8a08843777941c63f87f88275e SHA-256: c4f193e31e1e66cc475512f96d9fb4fb67598beddf0a9498c9063b4fedb7f96f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=arabic+ocr+software+free', indicating a lure for users seeking OCR software, which then redirects to malicious content.

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=arabic+ocr+software+free In PDF document text
    • http://files.lifestylepoolservice.com/uploads/1/3/1/4/131437680/4e4a0d055.pdfIn PDF document text
    • http://nifuto.andreacontee.com/uploads/1/3/0/8/130874642/feguzegozuvoduru.pdfIn PDF document text
    • http://duzote.katieandpaolo.net/uploads/1/3/1/6/131637896/83e75e910f157.pdfIn PDF document text
    • http://files.bromfield.org/uploads/1/3/0/7/130739490/tubujojodila_samukuri_xufiwozu.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/1/0430/5698/8311/files/berimuvomujomivelekewiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3110/1345/files/17562377184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/symmetry_worksheets_for_4th_graders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/72997546335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/literature_review_on_annona_muricata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/98203154252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/sepepiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/bikogibogefezezar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/nujevaduwosuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/84381089772.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 4

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_off0000765b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x765B 5064 bytes
SHA-256: e4969511ca2803c28c356eecac7bd6278fcb4904ebe5f8aece53a03ee0184f7c
font_01_sfnt_off000087b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B0 10692 bytes
SHA-256: 85d3a8f8b00d91d83f84959cd2e461aca840a486c8b3613808d2553236f03658

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