Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0e63e33a3b6c55…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 17:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a654cc33327a27c3c78f2a21a0fe7ede SHA-1: ddba95030fc21f01edceda717ab578411076f03f SHA-256: 8f0e63e33a3b6c55c31f38ceaf931d151d8fd7cb543a737b9fb5d4fee33755ba
150 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.com, disguised as a document about leadership styles. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=autocratic+leadership+style+definition+pdf
    • http://files.jarpromotion.com/uploads/1/3/0/8/130814682/8b0b57.pdf
    • http://files.pennjournalconlaw.com/uploads/1/3/2/6/132682694/bawibixijuzawo.pdf
    • http://files.well-builtcity.com/uploads/1/3/1/4/131437655/1f15a7e.pdf
    • http://puzezaxif.culturempls.com/uploads/1/3/1/4/131454106/xilumawudozada.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/wijabelewekepurazevolujof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/25698619220.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/gebinoxawej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/if_else_statement_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/63155262593.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/bahari_za_mashairi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/3124132348.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/jusoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/72223554077.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_off0000770b.bin
f77866332bba0fd6f208d99322c6750a1e76076de1280b044fb596bd13b543ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 5336 bytes
font_01_sfnt_off00008933.bin
e02673040a10f85e679d17affa373c0e2b7202ef23f0c07b0459809ef355b214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8933 9880 bytes

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