Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8184f3db3bfea4…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 22:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b2e8a9026cbbd02da4182f362693a9d SHA-1: 43a64ee3f50ea5251b67fffc3c3751dfb823c424 SHA-256: 4b8184f3db3bfea42ffa70311fd74c7e7ff71e27841215bf317094d47f2a48a6
128 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'Volvo bm 430 instruktionsbok pdf' and includes a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains a reference to the malicious URL. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to benign Shopify domains, but the primary redirector is malicious. The presence of a visual download button lure further supports the malicious intent.

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.cc/pify?keyword=volvo+bm+430+instruktionsbok+pdf
    • http://files.loveletters.website/uploads/1/3/1/4/131437676/lasomemozoxeb.pdf
    • http://files.communityplanningishere.org/uploads/1/3/1/3/131383424/wasasifetawi.pdf
    • http://files.bleststudio.com/uploads/1/3/1/6/131636825/vekepulipad-kenetuxab-woluluwoguzid.pdf
    • http://files.denimxbonnie.com/uploads/1/3/1/6/131636825/9994196.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/wutiseka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/9271484266.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/deadman_wonderland_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/letevazovejozekefora.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7162/files/68206246243.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/larepodarevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/xinotanodubapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/72963568186.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2653/files/61917940275.pdf
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/ethical_issues_in_business_research.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_off000060b3.bin
b3ab848b6568e259daf7c584e3b2c59a2bfc9ec6b16c2d389ce7306f0c327bee
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 5600 bytes
font_01_sfnt_off000073b5.bin
f7819fdb4f7979a88c182f090c1daf97cca5f6c7d2488c20401f77116dcfce31
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B5 11228 bytes