Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd161f7716478f2…

MALICIOUS

PDF

37.0 KB Created: 2020-08-10 01:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1d44df935d36658c3afe909473ebca3 SHA-1: 1c2cb057843a35ad2f1b6f601fb3811ace2035a2 SHA-256: 7cd161f7716478f21a84d97bd446cb69d32f362a6f02076f2979469ad3792367
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links designed to direct users to a link farm, which in turn uses a redirector to obscure the final destination. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains the URL "https://ttraff.cc/pify?keyword=worthy+is+the+lamb+music+sheet+pdf", suggesting a lure for downloading a music sheet PDF. No scripts were extracted, but the structure indicates a phishing or malware distribution attempt.

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=worthy+is+the+lamb+music+sheet+pdf In PDF document text
    • http://files.ieltsecrets.com/uploads/1/3/2/6/132695321/02ce317f26.pdfIn PDF document text
    • http://files.educfrontiers.com/uploads/1/3/0/7/130775676/2c159.pdfIn PDF document text
    • http://files.jaredmichaelsobotka.com/uploads/1/3/0/8/130874683/99a43d7122.pdfIn PDF document text
    • http://files.womanstouchnj.com/uploads/1/3/1/4/131437677/vivizilopiz-tidofivebulo-retaninov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/49689920154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/41369728324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/buniferenawikabesogederix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/16444055072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/1687888662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/buvuruxoruwuwexabol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/grama_sachivalayam_syllabus_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/dasugenozutopoxutuxukej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/49506117646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/11741268909.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 3

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_off000043f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43F5 5428 bytes
SHA-256: 879f3c4e0e7599e2148b898a6157e6e75e801634c3a11086483a3aca78be4089
font_01_sfnt_off0000567b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567B 10084 bytes
SHA-256: 84fd61a280d8ca0cf6926f23438f911671b709142e4a2a653d5feff432ae8350
font_02_sfnt_off0000790f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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