Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f91ccc7278a0b1…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 19:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1800375d7ffc148efef68348c66492d2 SHA-1: 3648a652e2b6e6c6053336516afb55ffdef34a73 SHA-256: 43f91ccc7278a0b1dad38a2b981a86df4667c7b7bd3874cd90d7c49c7a4d68f6
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=chat+room+free++apps, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files hosted on Shopify, suggesting a lure to download further 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=chat+room+free++apps In PDF document text
    • http://files.livingbeginshere.com/uploads/1/3/1/6/131636965/2bbb1951694267.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/1/0432/3731/0626/files/pukelarumedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/rexorunilenizow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/57451987115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6030/9665/files/angeles_y_demonio_dan_brown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/zawozogufagipanuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7186/3961/files/ludinexokezuraritu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/81759616193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3419/8684/files/how_to_join_a_discord_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0364/9954/files/lefagawuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/76082401029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/xemit.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_off000065a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A5 5016 bytes
SHA-256: ce98d155645bf3141f28d36afeb559b524b914542dc7363c26642011e807699c
font_01_sfnt_off00007693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 9920 bytes
SHA-256: e2d1f21a3958433e8a8b871aab7f8c18b3ea543ad01eb6221063c1e110fc3e6c

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