Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcbd1df95e306d2…

MALICIOUS

PDF

40.1 KB Created: 2020-08-17 18:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f7704bf3082931220b5732799b4622d SHA-1: 9d1ba9feea957098b3175808094ee70f6d707701 SHA-256: 1dcbd1df95e306d2dc501cc0b8a32f501ee7ef590cd2b11f589d3fbf9dccbe63
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'appointment letter format' and includes the primary malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users to the ttraff.com redirector.

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=appointment+letter+format+in+word+in+bangladesh In PDF document text
    • http://lufim.hersacredsanctuary.net/uploads/1/3/1/8/131856190/wikaxekiwozemipub.pdfIn PDF document text
    • http://files.twoshade.com/uploads/1/3/1/3/131384777/6180219.pdfIn PDF document text
    • http://files.dustinretrievers.com/uploads/1/3/1/6/131636584/8790014.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/1/0430/6406/6209/files/tabuwebedejinorerus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/24201554109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/9853519113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/seether_truth_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5268/5726/files/pudenijejejibitewunazefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/87630007270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/60812549275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/zipopijunapoviruxoxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/campus_politics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/gonunagitutede.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 2

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_off00005ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 5676 bytes
SHA-256: a0f40733ee719bf75d8f34acdad17cf395cc2d6fff9262b74f6049f3211dbcbc
font_01_sfnt_off000071ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 9756 bytes
SHA-256: 81a53294e5981755db98e34b1eb983751e67ef501a56cc2f16f9f90f8f5dcd34

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