Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d8b3eee688bc73…

MALICIOUS

PDF

78.1 KB Created: 2020-08-02 15:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73c100ec043daf36b94b5123446b364a SHA-1: 703962d2574f608e9061018319c356555dbf2598 SHA-256: d4d8b3eee688bc73f4ddbcc844af1a6d17603ecf4218149b5ca4b9ec0eb3da51
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains references to 'justin bieber sorry song download' and the malicious URL, suggesting a lure for users to download content. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, likely for SEO manipulation or to host further malicious 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.cc/pify?keyword=justin+bieber+sorry+song+download In PDF document text
    • http://files.dryoutyourhome.com/uploads/1/3/1/4/131407977/tulagegapesafufajazu.pdfIn PDF document text
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdfIn PDF document text
    • http://files.sdsimages.com/uploads/1/3/0/8/130873732/7050966.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/1/0429/9443/4202/files/ludifabeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/97741866595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/86140211728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/14251628762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0992/3480/files/75668790988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8075/3058/files/bupokatamid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/bokekisivufelaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/kinizinafigikudutaretepoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/kiwavevuxuwuxugavogumos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/88431889487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/77002513016.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_off0000dd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 3136 bytes
SHA-256: a9879f94c3de0370bbf099cba19345659fa3e7eff91fdea10569de354856d757
font_01_sfnt_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 5316 bytes
SHA-256: 4fd42ed38c6b32b22f8e392f4823f948564e7d64e6def3a8676f2b2fde7e946c
font_02_sfnt_off0000fa68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 15972 bytes
SHA-256: 8833ec397702feb707b011e7615bcce2af85ae650038c4829a8b0a5fe57e24e7

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