Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c81d0a6e6a478f5…

MALICIOUS

PDF

45.0 KB Created: 2020-08-17 14:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4636eee3e7f56cbc864a1ec25499003d SHA-1: 9ea61e608cc9130705af885cbf59e8a1ae4d6fc2 SHA-256: 9c81d0a6e6a478f5fdb093a4da65ed7775effdd9efa02eb427c42cc23b52933b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=presbyterian+healthcare+services+annual+report+2018'. This URL is designed to lure users by mimicking a legitimate report title. The file also contains a large number of embedded links to external PDFs hosted on Shopify, which is indicative of a link farm. No scripts were extracted from this sample.

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=presbyterian+healthcare+services+annual+report+2018
    • http://files.compcog.com/uploads/1/3/1/3/131383860/gegubinaxi_biketu.pdf
    • http://files.advancedurbanmarginality.com/uploads/1/3/1/3/131383586/7515916.pdf
    • http://files.pensacolacraftbeer.com/uploads/1/3/2/6/132695887/xezujunarita.pdf
    • http://files.douglasyassen.com/uploads/1/3/0/7/130775337/992847.pdf
    • http://files.pokornychiropracticclinicsd.com/uploads/1/3/1/6/131636746/toletumarilalen-goraxewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/wopexupunaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/85409494139.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/43650955025.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3643/files/oblivion_cure_vampirism.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/vuzuwowewawarozejoxilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/78578994097.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/bevipubidejukidiwuri.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rupiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/87090068948.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/83988876738.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8218/files/pinavaforoduxegijowuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/differential_calculus_by_shanti_narayan_and_pk_mittal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/budgeting_and_planning.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_off00006547.bin
15608b5b9d45d55f255689809d4722e111ddd9b55047e4c2111497970615ec3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6547 5844 bytes
font_01_sfnt_off00007923.bin
e42bbcccc71be11ff5a3699bd09016a8a76bb9386a62a907d9266c7d09b30178
pdf-font-stream PDF embedded font (sfnt) at offset 0x7923 14636 bytes