Malicious PDF — malware analysis report

Static analysis result for SHA-256 f665a36dad3b7d89…

MALICIOUS

PDF

44.7 KB Created: 2020-07-25 11:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6c619daec67f398d7df4434a2a31c7b SHA-1: 721cb23c0f0cd17277ef3e882c797dabaaec2e00 SHA-256: f665a36dad3b7d89816b414d8ddc811021492dd9824af6f1241d4f0be0499819
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to a known malicious redirector at 'ttraff.com'. Another heuristic indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of 'Smadav antivirus software 2019 free' suggests a potential lure.

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=smadav+antivirus+software+2019+free In PDF document text
    • http://files.americanlebanesefestivalaz.com/uploads/1/3/1/4/131437956/disuzofofemigos.pdfIn PDF document text
    • http://files.bloomfieldlive.com/uploads/1/3/1/4/131438464/xukasum.pdfIn PDF document text
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdfIn PDF document text
    • http://files.frederickjbrittain.com/uploads/1/3/0/7/130740573/2262058.pdfIn PDF document text
    • http://files.jessicamattinglypsyd.com/uploads/1/3/1/4/131407263/jemowuvinam.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/1/0433/0687/7080/files/romiket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/28325948729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/40428683072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/kujefagatiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7841/8583/files/zesegokerolevifuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/raridoxuvidut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/lejuxus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/rinojuzubibunoxujefeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/lijunanimulawudoxi.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 8

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_off00006f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F86 5640 bytes
SHA-256: ada0f53f5946eb14cf62275f156b19754e9fe0cd788b5cada3b17a02588dd38f
font_01_sfnt_off000082b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 10276 bytes
SHA-256: 642f90323278b85547c397fbd2581710a654bd2a0561989e2482eea413082afe

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