Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35dde438321b652…

MALICIOUS

PDF

37.1 KB Created: 2020-08-15 10:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea413fa5cc6db8df794792212bf2f7c1 SHA-1: b5fffd2eae3b422c4ae373574d700e98252b1e5e SHA-256: f35dde438321b652bd5eabcfde31ffa860b7a27753e0325fc12daf697988b500
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to external PDF files hosted on various domains, indicating a link farm or redirection strategy. One critical heuristic firing identified a link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the primary attack pattern appears to be social engineering through a link farm.

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=crossword+clue+censure+informally In PDF document text
    • http://vetex.productivefocus.com/uploads/1/3/0/7/130775735/zepilexo-kanizipakofides-wudusak-pegosozazajovav.pdfIn PDF document text
    • http://files.villagesarcheryclub.com/uploads/1/3/1/4/131437157/zelasete.pdfIn PDF document text
    • http://files.ncccspa.org/uploads/1/3/1/4/131437061/nudirup_detaxo.pdfIn PDF document text
    • http://files.truceteachers.org/uploads/1/3/2/6/132681863/koperito_dufopetor.pdfIn PDF document text
    • http://files.roddyconsultinggroupinc.com/uploads/1/3/0/9/130969386/9185410.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/lamafavikunidamekisuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/35425725331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/mirafefusojuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1764/1879/files/gamefitafum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/gorillaz_demon_days_album_zip_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1644/4311/files/getolavipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9081/8712/files/fekufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/angularjs_tutorial_for_beginners_step_by_step_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/nupogixawilug.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 4

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_off00004a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A76 5264 bytes
SHA-256: ba52be70545d1b5c0288fda71eafec0556920660cc989af70a96debc715eba79
font_01_sfnt_off00005c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C55 13932 bytes
SHA-256: abebf360c870d4a91cb1d1786595d7bd3e80545a8922873537587afa5d1a4fb6

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