Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b433a483c94324a…

MALICIOUS

PDF

39.6 KB Created: 2020-08-06 09:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff5404eee81c9681040d4877f28bd667 SHA-1: e368f160d454ea71d6f2816a3ec64a358f9d6c24 SHA-256: 5b433a483c94324a6a80b69419fda0ac7bd27951cb5a0dd95f07d29b2284ed6c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a redirector infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=anthropometric+measurement+procedure+pdf, which is flagged as malicious. The document body, though heavily obfuscated, contains references to the same malicious URL, suggesting an attempt to lure users to malicious sites for phishing or malware delivery. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=anthropometric+measurement+procedure+pdf In PDF document text
    • http://files.cpsaltlakecity.com/uploads/1/3/1/6/131606186/669993.pdfIn PDF document text
    • http://files.thewell-seasonedwoman.com/uploads/1/3/0/8/130814535/sitiguzaliju.pdfIn PDF document text
    • http://files.extramagicvacations.com/uploads/1/3/1/4/131454345/wuvefonawosemekex.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/1/0430/3070/8385/files/kulipajapulujuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9432/4888/files/namuladitumakobakovij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/1803688199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/pewogululazewejoteliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/69359026744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/88957147407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/tixarufaduju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7598/3765/files/18177203827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/sony_icd_ux533_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/65634794182.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 2

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_off00005ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED8 5352 bytes
SHA-256: 7e040b32ee8bec9d5aee85db86497c0a55104bc3e0ac13d4eb9cf655a915c1d5
font_01_sfnt_off000070df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DF 9580 bytes
SHA-256: 120b3dfba55088288639e39cf8f04620ef8d03625181830a462fa92660430f66

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