Malicious PDF — malware analysis report

Static analysis result for SHA-256 a592a6b7885da5b9…

MALICIOUS

PDF

43.0 KB Created: 2020-08-06 15:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4a55c339a5e4be8cc7617da72210652 SHA-1: ea4d9069deb076cb219a7109ad3a7f2b38453c1b SHA-256: a592a6b7885da5b9b9e711f7f8cd97e76625f9fbf6893f30bd2ee1e31e40fe14
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a significant portion of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/pify?keyword=convert+html+to+pdf+free+online+conversion, is identified as a malicious redirector. The presence of a 'download button' heuristic further suggests a social engineering attempt to trick the user into clicking the malicious link, likely to download further malware.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+html+to+pdf+free+online+conversion
    • http://files.rebeccakautz.com/uploads/1/3/2/7/132710756/ruguwefelabege-mijatajiriz-gisaka-vijodewenizikob.pdf
    • http://files.yogashivaya.com/uploads/1/3/1/8/131856815/f149c5fd80738c.pdf
    • http://files.dufrane.com/uploads/1/3/1/3/131379639/nelawid-vaxit-wigikuki-vejifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/john_deere_generator.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/bisuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/pinibogegubufapa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/66701013591.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/54035785602.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/air_seasoning.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/613209620.pdf
    • https://cdn.shopify.com/s/files/1/0450/1949/6606/files/gba_emulator_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/labewimo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/mafikumivutozabotalowukot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/kabiwume.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/88033399099.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/fysa_vs_fyi.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_off000069c7.bin
936d9fb6fd7a0cf02869b672d9ac0c22db438a5de870e123e401402a5f6a6f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 5148 bytes
font_01_sfnt_off00007b2a.bin
d787636b5d18a8cf0c9f99de3affa5e5592ab891d6fc3f3459bb17188e280cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2A 10416 bytes