Malicious PDF — malware analysis report

Static analysis result for SHA-256 9255ef7b4dad3b60…

MALICIOUS

PDF

41.3 KB Created: 2020-08-12 13:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a3d18876607d82658fe7bf08bf2410e SHA-1: de204e244947d362fb2bf5cc16cf50db4bf3c202 SHA-256: 9255ef7b4dad3b601f6c42aa0e511c6895be0f60b17e44ca7fb0c4900864e64e
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=briggs%20and%20stratton%20quantum%20service%20manual'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to shopify.com domains. The document body, though partially corrupted, contains text related to a 'Briggs and stratton quantum service manual' and the wkhtmltopdf application, suggesting a lure to disguise the malicious links. 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.cc/wb?keyword=briggs%20and%20stratton%20quantum%20service%20manual
    • http://files.etsofd.com/uploads/1/3/1/8/131857284/muvavet-zebojomi-wemukevoxovuloz-muzagokij.pdf
    • http://files.mallowkitten.com/uploads/1/3/1/8/131856146/064771ff5cb1d6.pdf
    • http://files.medexnet.nl/uploads/1/3/0/8/130874161/4ac8332.pdf
    • http://files.cookcreativemedia.com/uploads/1/3/0/7/130775850/xuwodolow.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/damezoxifupugome.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/fulutiroxedaraduti.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/23868004102.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/sda_twi_hymnal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/nulurolajitujigikoner.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1609/files/red_sea_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/budgeting_process_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/xidaraxiwuwarisabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/84526643930.pdf
    • https://cdn.shopify.com/s/files/1/0428/2033/7831/files/reasoning_ability_tips_and_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1626/files/strategic_management_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3571/files/key_largo_boats.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_off00006270.bin
a2acd6971964e8dea33a377d288530677c94bdb655d95c101619ac303a506998
pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 5496 bytes
font_01_sfnt_off00007504.bin
ff74e0fd316a3afb3d29f5a652a89804172d53acc222c55db98d0a89eba08197
pdf-font-stream PDF embedded font (sfnt) at offset 0x7504 10260 bytes