Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb7a7387a322930…

MALICIOUS

PDF

52.2 KB Created: 2020-08-11 09:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c29780ae77e7956ec62d66f6cf1129 SHA-1: 49d911bb38f40583b9678fc597296aa833547a9e SHA-256: dcb7a7387a3229300a02cb48b5c4c4e0fe2fc7161476dfb8e0ccef967653d2ed
120 Risk Score

Malware Insights

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

The PDF document is disguised as a resume sample to entice users. It contains numerous embedded links, with the primary malicious link directing to a known redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of outbound links, many of which are likely part of a link farm. The document body itself contains the malicious URL and other benign-looking URLs, suggesting a social engineering tactic to drive traffic to malicious sites.

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=resume+format+sample+for+job+application+pdf
    • http://vekin.joshuamilton.net/uploads/1/3/1/6/131606347/92437a2e6e22e7.pdf
    • http://files.photographybyjohnholliger.net/uploads/1/3/2/8/132814476/180636.pdf
    • http://files.pennwealthreport.com/uploads/1/3/1/6/131636769/4392f34e.pdf
    • http://files.gradient.services/uploads/1/3/2/6/132681325/3782547.pdf
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/tudapufuwitifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/suxelofajikagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/53377863637.pdf
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/mogawaxukebelifipagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/nokopamugepakavegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/11006598564.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/57697506620.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/xanozumopobevabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/jalofoxotiwaxuminuwab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/3577513970.pdf
    • https://cdn.shopify.com/s/files/1/0448/2092/2528/files/teoria_causalista_y_finalista.pdf
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/65885544997.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/75794521809.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/11459600251.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_off00008ce1.bin
e52fab21c3653311a43b990b7ca7d9b8ef1b0faddeb09c3c8d91a7d614b9a911
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE1 5524 bytes
font_01_sfnt_off00009f8e.bin
e1612449478034a47172dbf00261b30713c9603c88ee3abf3288cb7174bdc6e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8E 10576 bytes