Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e44293d740d274a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-25 12:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3f9599863a377541adb36828176b409 SHA-1: 63a49a987d6998132ae6b1b785763117ac9ae1c1 SHA-256: 6e44293d740d274ac64506b7cf74a16694c850d5b91cf3352c83b500b954effd
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a title related to chemical formulas, suggesting a lure. The presence of many external links, including a large number of generated SEO PDF links, indicates a link farm or spamming operation. No scripts were extracted, but the primary attack vector appears to be directing users to malicious URLs.

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=chemische+formeln+lesen
    • http://mefozaneb.litturi-photography.com/uploads/1/3/2/7/132710567/rijusiwub.pdf
    • http://files.mbilder.com/uploads/1/3/1/4/131406816/1092288.pdf
    • http://files.shamanmodifications.com/uploads/1/3/2/6/132695633/liguluxivetemez.pdf
    • http://noxonu.dailyharvestgrocery.com/uploads/1/3/1/3/131398406/sezazunogupafebofor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1116/0739/files/kawinelupefalitonena.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/vedasosolotupowizokewir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/dirulesama.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4080/files/66446849118.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/vomuxajasinekabelakododo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/what_is_the_8862_tax_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/zuxonuwevelabuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/hubstaff_api_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/18007550564.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejolezogumulugadajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/xexorexarif.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f9.bin
40dcc3dfe2324973f2a76036dd262b87fa2931f2aa93eabf158f21de19885d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F9 4816 bytes
font_01_sfnt_off00007932.bin
e97030c08bc8469d2be1c13a83ee2b13e3939d7aaa62d73fef574e3a51373fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 14792 bytes

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