Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc809d7f3375852…

MALICIOUS

PDF

41.5 KB Created: 2020-09-13 19:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad2483e706b4a0f360c957bed0c3d053 SHA-1: 5181fa6b1c394aeea92e71a07dc793a86998f3b6 SHA-256: bdc809d7f33758528fa9003972e13bf7dd9d3f3032918433c4c37c31cf6f0cdc
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources, a common tactic for link farms and SEO abuse. One prominent link, 'https://ttraff.me/pify?keyword=bloons+td+6+apk+free+download+ios', is identified as a malicious redirector, suggesting an attempt to lure users to malicious content. The document body, though heavily obfuscated, contains references to game downloads, reinforcing the lure. The ML classifier also 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.me/pify?keyword=bloons+td+6+apk+free+download+ios In PDF document text
    • http://bivili.ohvintrkjam.com/uploads/1/3/1/4/131483108/152245d5.pdfIn PDF document text
    • http://files.gingerhannah-lifecoach.com/uploads/1/3/1/4/131452958/ed49d.pdfIn PDF document text
    • http://files.inplaypilates.com/uploads/1/3/1/3/131384604/zifivagi-nelobus-tabixu.pdfIn PDF document text
    • http://files.mitchcom.com/uploads/1/3/2/6/132695467/99465709.pdfIn PDF document text
    • http://kewitazuf.fairytalebrides.org/uploads/1/3/0/7/130776763/51ba9925700e1.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/1/0438/1235/6253/files/jitozolavofuwidexawomig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5529/2321/files/78806275481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/infinite_geometric_sequence.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/909b15_ca4c23aab782460a8bcebbbed7a21e35.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ced2dc_63e04f6c076e45399e400815aa738f01.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c44ce_8010a68483384b8289d28fed20f7e1d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c618e9_185cddb267c147d1b2c807afea2febda.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf14a4_c1451e8032514d06885451ff7c752e15.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 6

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_off00006225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5396 bytes
SHA-256: f75d3c1cac5418fb1e3431c7629b705037544a5ad9f20316b9d72a876eee13df
font_01_sfnt_off000074a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 10788 bytes
SHA-256: e417b799455ab2201a13d3560ebced195cb60da1d4756e23bb52ae7658649e73

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