Malicious PDF — malware analysis report

Static analysis result for SHA-256 d914fff15e61463e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-08 17:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a2043bbad814d274ce3c6e000adb55b SHA-1: b81baa51f38a359b37c60285dce79e7fbd8a785f SHA-256: d914fff15e61463eb2f443d7120e90dcef145717f067bd00fda60b93fbe9d268
120 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, disguised as a document about cervical muscle spasm exercises. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of similar links were present. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector.

Heuristics 3

  • 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.
  • 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=cervical+muscle+spasm+exercises+pdf
    • http://files.ldk-art.com/uploads/1/3/1/4/131438389/7365829.pdf
    • http://files.f3s.org/uploads/1/3/0/9/130969984/valudogudi-jorokarijigef-latineg.pdf
    • http://files.mrshaolebrownie.com/uploads/1/3/1/6/131606260/wabokepav.pdf
    • http://files.scenichillretreat.com/uploads/1/3/1/3/131383949/6555559.pdf
    • http://files.sacredgroundcollective.org/uploads/1/3/0/9/130969404/c40eb426.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/4016708379.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/the_whole_earth_catalog_1974_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/zeraxavusawovixovu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/libros_de_alimentos_transgenicos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7265/0397/files/ziberufudonanutesosijafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/gisulav.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/gadusuniwafevika.pdf
    • https://cdn.shopify.com/s/files/1/0428/7607/6188/files/60542139992.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/gunipi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/rusofogibudo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/49406866034.pdf
    • https://cdn.shopify.com/s/files/1/0450/0160/5278/files/angina_estable_gpc.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007200.bin
c380e62ea5e5c65107bd1170a15fa4541527669fa33d74fca96e4df4f620fef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 5336 bytes
font_01_sfnt_off00008414.bin
4d95ad0730453eb2ecbcdf0f3497549bc950180d2981a082c335573ded51d7b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 9756 bytes

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