Malicious PDF — malware analysis report

Static analysis result for SHA-256 28aaca34ac049698…

MALICIOUS

PDF

45.7 KB Created: 2020-09-10 23:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 027a9c20a2f777080abdde5e6d59dbc8 SHA-1: 6e259100b26dd6c16beab9e89624c562d5fbfbcf SHA-256: 28aaca34ac049698e9d1011131fe515f4d9991c50536a0f450947f0f1df015df
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.me. The document body, though heavily obfuscated, contains references to sheet music and the authoring application, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=czardas+monti+sheet+music In PDF document text
    • http://wizijot.longislandtu.org/uploads/1/3/0/7/130775734/siligagamul-xemogi-pimitebalobew-lixopufa.pdfIn PDF document text
    • http://zofuxipad.livinge.co.uk/uploads/1/3/2/6/132682878/wukegitoweba.pdfIn PDF document text
    • http://files.sweetwaterlax.com/uploads/1/3/0/8/130874125/4019235.pdfIn PDF document text
    • http://files.ohbotusa.com/uploads/1/3/1/4/131437530/3146425.pdfIn PDF document text
    • http://files.mutianyugreatwalltours.com/uploads/1/3/1/4/131406258/1b126f4c35a.pdfIn PDF document text
    • http://nenavisom.dinki.me/uploads/1/3/1/6/131606365/gadilokituxefesora.pdfIn PDF document text
    • http://files.kpcohuntsville.org/uploads/1/3/1/0/131070207/vexavaminonikej-zedumi-tetogipiw.pdfIn PDF document text
    • http://fawafizo.godfrey-lee.org/uploads/1/3/1/4/131407995/salutebemew-rufisutimararez-walibefeju.pdfIn PDF document text
    • https:///www.youtube.com/watch?vIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/0bfb20_056a8a02af2e4e5da2eb147bcc774db3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4b7290_a2d7224b38c540d281e2131e6a485994.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_16f109af16784a0ba3310f4d05027548.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b42fd6_1b1248592ceb4c9da6f182d2fde12ce8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4117a9_05f1c49224d0418a8619f339c4e5db85.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000055d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55D4 5100 bytes
SHA-256: 85a05a9b40619086757ee144cf148561b02582a3a9e76846d9bef29519d3e0ff
font_01_sfnt_off00006704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6704 14472 bytes
SHA-256: 3942b4fe2ff3f60fa633794a6eb7bd879500ed8a7d605d104e6b49ab0c18b51c
font_02_sfnt_off00009444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9444 16232 bytes
SHA-256: fdb6c9292ab0a75b7983ebc4d100a0cb21c33c5809789cafa65d4c1ce838e8a9

Open this report in the interactive analyzer, or submit your own file for analysis.