Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f550c27bbcce7c…

MALICIOUS

PDF

32.2 KB Created: 2020-08-16 19:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa34a7c43ca62294a43efe851fbf6392 SHA-1: 688dd849ae3fc6ccce309db50c3ec195aae53861 SHA-256: f5f550c27bbcce7c6b051f925a1a51cafd47de92d6102ac7a8f6629b18a3e686
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'quarterly report'. The primary malicious URL identified is ttraff.com, which likely serves as a gateway to 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.com/pify?keyword=quarterly+report+icsi+online In PDF document text
    • http://files.mailfromacat.com/uploads/1/3/0/7/130738753/sijosunuwirom-kizidexutu-lozapajo-masugowij.pdfIn PDF document text
    • http://farug.live-life-organized.com/uploads/1/3/1/6/131637257/9393333.pdfIn PDF document text
    • http://gotudos.brewerystreet.co.uk/uploads/1/3/2/6/132682685/1172223.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/1/0428/9835/8432/files/luzugojozawok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7279/7337/files/calendrier_2020_octobre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/wojajepedutemuzogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/93099159184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/pigiweleguwojitetavesamiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3038/4537/files/michael_jackson_type_song_onlineaudio-_converter._com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3576/1567/files/45786407115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/sodazaganabasajov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/buwuvewalirexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/99584235774.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_off00004374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4374 5088 bytes
SHA-256: 013adc3eea7dc9291c138c5bd1a3a704a9f3934590a6ff94b6d70f61fa6ffddd
font_01_sfnt_off000054d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D8 9072 bytes
SHA-256: 493fa06de581ae4259597c2515183d2d2cb19981c21c62f3382126b040933c4d

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