Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5135ca6bd76e4b9…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 13:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15b7144bb1f541c74cc26e7d198fbb50 SHA-1: 6cce0022fd031304b9669b38bfac2b975c21fe63 SHA-256: c5135ca6bd76e4b96cc8250928091d7813b96685bce01d9499f924a71b41b71e
162 Risk Score

Malware Insights

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

The PDF contains a lure for "Tv series app free" and embeds numerous links, many of which point to redirector infrastructure like ttraff.com. This suggests a phishing or scam attempt designed to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links reinforces this assessment.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=tv+series++app+free In PDF document text
    • http://gumazaze.womenofwpg.com/uploads/1/3/1/8/131871453/29ebd6c.pdfIn PDF document text
    • http://files.theavocadocupboard.com/uploads/1/3/1/8/131856039/sepolam.pdfIn PDF document text
    • http://files.cuicsocal.org/uploads/1/3/0/8/130814594/7502789.pdfIn PDF document text
    • http://files.best4youmassage.com/uploads/1/3/0/8/130874361/7417747.pdfIn PDF document text
    • http://files.shiragirlschoir.org/uploads/1/3/2/6/132681438/b19819daffed.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/1/0432/9163/9974/files/10081818623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3347/3703/files/35268223909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/33052546965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/sesukipod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/pazobukewawodik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/55399953455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/bonomusogugumog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/fashion_catalogue_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/github_host_website.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 8

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_off00006bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC1 4872 bytes
SHA-256: 6f13ae3abe31acbc41036f414d84c3f7af4305fc0b4c2cb454ba29d995c247c1
font_01_sfnt_off00007c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6A 10428 bytes
SHA-256: 5b089bfc73fcc6521dceb7c19276b89437354fa1167dc641e991b84482c6eaa9

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