Malicious PDF — malware analysis report

Static analysis result for SHA-256 19371a8814b7c962…

MALICIOUS

PDF

37.6 KB Created: 2020-08-25 01:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f05c557998eeb2a027b04ff623af2f7e SHA-1: fe1718ea7ee12850461e81afaa3bc677b21dd0da SHA-256: 19371a8814b7c9628ac619c0c2fd51337c1c6103b87d8799cca4b9298dd2ecbc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains references to a UN development program and includes the malicious URL, suggesting a phishing or social engineering lure. The presence of numerous Shopify-hosted PDF links further indicates a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=birle%25C5%259Fmi%25C5%259F+milletler+kalk%25C4%25B1nma+program%25C4%25B1+pdf
    • http://jafinit.buttonwoodheights.com/uploads/1/3/0/7/130776659/zaropatel_liwakil_mivavez_sopevimit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/97742344855.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/24439390827.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/2021307870.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/jufowalerejajapene.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/sibisibutovobunikimum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72438278193.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/segefegijekubefotuvazok.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/79932252208.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/call_of_duty_ghosts_crack.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/54450933987.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/bilingual_approaches_to_language_learning.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000449e.bin
60f9da088f53875bacf2dc34bf075eb2ef907bbdef036179db4f9107d3c4ee85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x449E 5364 bytes
font_01_sfnt_off000056bd.bin
9688cd6ebfa3749c7a85e8cdf864dc550020f1c8e6fea6921a137bd2386efdf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BD 11092 bytes
font_02_sfnt_off00007969.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7969 4324 bytes

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