Malicious PDF — malware analysis report

Static analysis result for SHA-256 b594fd59445d0d9d…

MALICIOUS

PDF

34.9 KB Created: 2020-08-04 18:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e94368b97e29c2df9c17906265a287c SHA-1: ab458275308b1444a7b66a8c1e5c2f0adb4643ed SHA-256: b594fd59445d0d9dc77e42d304ab308c7b16c20a9cade78b3049ad27941df0ff
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to redirect users to malicious sites. The presence of multiple Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic to increase visibility and clicks. No scripts were extracted, but the document body and heuristics strongly suggest a phishing or redirection attack.

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=prioritization+delegation+and+assignment+pdf
    • http://files.halbertrugcompany.com/uploads/1/3/0/7/130739916/nivugugukuki.pdf
    • http://files.friendsofmarplestation.co.uk/uploads/1/3/1/4/131453247/davifuvowuzuva-nidemezalon.pdf
    • http://files.berkes-sanchez.com/uploads/1/3/0/7/130740231/towelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/52384726975.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/64598735507.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/us_city_populations.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/51075217047.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/41637435198.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/tamabilogibekiseme.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/20302096213.pdf
    • https://cdn.shopify.com/s/files/1/0428/6588/5351/files/tipebukudapekemis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/saponejaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/dolixoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.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_off00004a1c.bin
168f71af0fac098556e995571245554cc8adf427734d290ced7f88b12bdcbeb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A1C 5412 bytes
font_01_sfnt_off00005c75.bin
4728d36f0e74922cb94a778f4bf504d49be41e6d51db81d824be2a7d2de4076b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C75 10032 bytes

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