Malicious PDF — malware analysis report

Static analysis result for SHA-256 4095a3ff8c402a53…

MALICIOUS

PDF

39.6 KB Created: 2020-08-03 17:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3a0e849df749e9a25f5a2635d133e93 SHA-1: 420b5f65d6186cb6f97d87f2cd4c36363f2d3e3a SHA-256: 4095a3ff8c402a5363eebd8a6a3c465e2d5fb0bbf853b046946588528a0309cc
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the primary malicious URL being https://ttraff.com/pify?keyword=anti+skid+braking+system+pdf. The document body itself is heavily obfuscated and appears to contain junk data along with the malicious URL, suggesting a lure to a malicious site.

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=anti+skid+braking+system+pdf In PDF document text
    • http://files.prideypets.com/uploads/1/3/1/3/131398268/6447774.pdfIn PDF document text
    • http://files.millikenentertainment.net/uploads/1/3/1/4/131437702/632149.pdfIn PDF document text
    • http://files.ckgrealty.com/uploads/1/3/0/8/130813042/1293360.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/1/0433/4750/9416/files/bamabuluvasiwalevemidan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2785/files/google_wifi_centurylink.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/57675233608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/sagurepenetolewonojelutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/55802603237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/big_balls_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/xutilalusijijesubofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/59750922476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/paint._net_smooth_edges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/dirigamozotelala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/vafipadafoj.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_off00005e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E59 5624 bytes
SHA-256: e246d7b9b5fc252ea63a64ff82b87373be433c9315a2341885289fa29853de46
font_01_sfnt_off0000716c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716C 9464 bytes
SHA-256: 280e8afd5bf9fea452d8e8018b97654312c0675361b42a70ab4436f1b3a597b9

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