Malicious PDF — malware analysis report

Static analysis result for SHA-256 f121cd7b9908c79c…

MALICIOUS

PDF

37.5 KB Created: 2020-08-19 16:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5292367fd02c8b5aaed1de9775b1726 SHA-1: 42a7eeea8bd36d7adcff77daa8fc58acb6f2f9ad SHA-256: f121cd7b9908c79c1cc9fa9d5632ea1154d1ccc552b8bbccd1663901bf2216d9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a 'Bengali dictionary Java app' lure. This link, `https://ttraff.com/pify?keyword=bengali+dictionary+java+app`, points to known malicious infrastructure. The document also features a large number of external PDF links, many hosted on `cdn.shopify.com`, which is indicative of a link farm designed to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=bengali+dictionary+java+app In PDF document text
    • http://files.joshreynoldsyeo.com/uploads/1/3/1/3/131383541/tokalewutexatad_loxekusak_dafojuwejesunep.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/1/0433/7808/1959/files/63972340355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/14416246057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1136/7331/files/42697670624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/pivaguvizerisuvaludakutud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3237/9545/files/33318660579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/resekasivugolizimakuxujaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/luluzawuvino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5916/6888/files/veterans_day_facts_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/vibebibukalil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/98399889597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/zolewibawixod.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 3

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_off00004afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFA 5352 bytes
SHA-256: 234561cb0a28f290b29f15cc8b350ce6e82dd728717f2209c827535e94f628b4
font_01_sfnt_off00005d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 13500 bytes
SHA-256: 3fe9aa4d3b9e7d7e6cd290fc5e8a4663364be9427665f844d792dca865de3df6

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