Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6288c811f59e563…

MALICIOUS

PDF

41.4 KB Created: 2020-08-14 03:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792fd39a8c31fd9e014c0c823ab8a370 SHA-1: c500ece3500a06c6bfa1e977b0429f26aa8e3e8c SHA-256: c6288c811f59e563658399f59f7f1ab7af99402e8a49be171d40dc703e2a60eb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates a malicious redirector link, specifically 'https://ttraff.ru/wb?keyword=accountant%20job%20resume%20pdf', which is presented as a lure for an accountant job resume. This suggests a phishing or social engineering attack aimed at redirecting users to malicious sites. 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/wb?keyword=accountant%20job%20resume%20pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • http://dunafo.azlco.com/uploads/1/3/1/1/131164211/vitefikime.pdf
    • http://files.ngravinggifts.shop/uploads/1/3/1/8/131856456/4133848.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/53041145503.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/37776586877.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/98250819831.pdf
    • https://cdn.shopify.com/s/files/1/0434/8280/8472/files/94145944817.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/31038956778.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/57787838214.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/gazobixegutotagef.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/mejafidefiwes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/ecocardiografia_fetal.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_off0000637f.bin
ccb77ffd941be8500f66452fb1b40ed0914923e82c2ac7580f5482fa009a6ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637F 5476 bytes
font_01_sfnt_off00007603.bin
56319ecf8482f247035290557c1bd3d42b4420adefb6367b64dddc74da5bf5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7603 10300 bytes

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