Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a5638993504ea9…

MALICIOUS

PDF

50.4 KB Created: 2020-08-31 09:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf0dd0c9b88a73dbcc19a8f119bf7dfe SHA-1: 929bb61b34bae815f2eae16ff2fd46fa2e4817e4 SHA-256: f5a5638993504ea9ba8b8819c6453eb24a1634e752a8bd7e88befd5c7649457f
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The primary attack pattern involves luring users to a malicious site under the guise of a music download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=descargar+musica+de+conjunto+primavera+perdoname+mi+amor In 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://static.usrfiles.com/ugd/538d67_e984177f75444a298b996fdaaee779f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_20f2a63ed025432e8c3b46eb407c12ee.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_15391b1509634ac7be1bed88aeae6e23.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_04df39916c0448b7893174574e4d757d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ddb60a_f6317e139e8d4acc9f9b4b5eee99a330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/2605681356.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de60da_fd8b374967ed40a6b019a9d0084b9eb9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/26938b_2ec9f80825504625b11dd757f6470fa3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/44b221_e3c1cc0aa16d450194ed45611b6bf557.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_69d46a86d57242f8bd80074e665adb88.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dad90e_f0aff1d2bf8b4efa844d4baf4ae94fc1.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5797 5376 bytes
SHA-256: 0b365745720ca73e2bb386e42d23d6a39540d306677cb93f8b9f3532102f82db
font_01_sfnt_off000069c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 1792 bytes
SHA-256: 1b46d5bc4fdbf0d6fe8c63cd43ee594182eadc69f4e4c2f28049411ad73c8202
font_02_sfnt_off000072a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A0 11132 bytes
SHA-256: 2ef69c6933a83ffb5382b430112b278ba372e3b3db24af6347ca74e0fb80e8b7
font_03_sfnt_off000096f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F8 16580 bytes
SHA-256: 5f2d20c4381ad763ff9978e9dfd2c0bd65828dc6241a57e471787986de9f958f
font_04_sfnt_off0000adc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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