Malicious PDF — malware analysis report

Static analysis result for SHA-256 c653d5f933f8b249…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 22:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b31db76f64371b63ac19c2d4580c6eb7 SHA-1: 1e06f8e43c819ace4ee07abab97a52148b1a7440 SHA-256: c653d5f933f8b249830fee884ba1f103f55fa401f8bb6a5f0a092adc8d0aeea2
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL, https://ttraff.com/pify?keyword=s4vb+bridge+rectifier+pdf, is likely used to redirect users to a malicious site. The document body contains obfuscated text and numerous URLs, supporting the conclusion that this PDF is designed to lure users to external, potentially harmful, content.

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=s4vb+bridge+rectifier+pdf In PDF document text
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdfIn PDF document text
    • http://files.the3x5club.com/uploads/1/3/1/3/131383651/kekifojegav-mimevaferigex.pdfIn PDF document text
    • http://files.belgiumil.us/uploads/1/3/0/8/130814078/9948652.pdfIn PDF document text
    • http://files.twochicksandarod.com/uploads/1/3/1/8/131871951/4f192.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/1/0431/9405/6861/files/alkaline_food_chart_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/zozurefapufamizuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4035/4982/files/supply_chain_logistics_management_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/gitovogeduguviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/zotavunitul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7707/files/braindumps_aws.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/33563673544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/13994483258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3315/0118/files/6170415164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/duvekebasojoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/83820525196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/aktiv_passiv_englisch_bungen_lckentext_alle_zeiten.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000583c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583C 5292 bytes
SHA-256: 26c729f79a941c3c71365b7d724cb720cc0b6232ca541a8cc3ddb3352956512f
font_01_sfnt_off00006a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 2740 bytes
SHA-256: d7f0d1ca95c2ea4b41eb2452cbaf1cef9a9298c42c75fe3cb6874998640ba6a0
font_02_sfnt_off00007601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 10412 bytes
SHA-256: c45af832b5d131e19be560af02b1c84b146bd789a076efa37d20230aa2e47ed2

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