Malicious PDF — malware analysis report

Static analysis result for SHA-256 618dc6a6c4d49859…

MALICIOUS

PDF

40.2 KB Created: 2020-08-08 03:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28b8cfe933cca10cba1ba6377a3bb389 SHA-1: 57efa5f95c11831a3146a83aabce0b2b9c43e8f1 SHA-256: 618dc6a6c4d498597260a997bc66e6ce7ee2c9776325b23c8619701cea986870
194 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDF files, with one primary link identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=english+story+pdf+mp3+download', which is flagged as malicious. This suggests the document is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

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.cc/pify?keyword=english+story+pdf+mp3+download In PDF document text
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdfIn PDF document text
    • http://files.yourinspiredwellness.com/uploads/1/3/1/6/131637279/3849766.pdfIn PDF document text
    • http://files.circle5feeds.com/uploads/1/3/1/1/131164472/9595537.pdfIn PDF document text
    • http://files.oregondunestriathlon.com/uploads/1/3/1/3/131383384/6395803.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/1/0427/7927/9527/files/kenisog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/napevenatogujun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/padukazaxawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/3m_scotch_tape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/history_of_computer_hardware_and_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9013/1609/files/61199924254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/what_is_case_hardening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/gesozuleperasoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.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_off00005e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 5768 bytes
SHA-256: 7dd0c7c7107c09152dc3b3ddfcc7757d2a1b6b980f0e245cd81bd3e6d9ed7287
font_01_sfnt_off000071ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EE 9852 bytes
SHA-256: fb08fa79c75440855d69dfc7ed0d57cc33090d18fae02cfe36a96942f32ca797

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