Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2eb7d0606b8c92…

MALICIOUS

PDF

49.8 KB Created: 2020-08-01 04:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97de2b692635e759f75d76eabe6e9ba1 SHA-1: cc883a4332a9466ea1fdfcac1aae7d994f0c7212 SHA-256: eb2eb7d0606b8c92b61689d61ff861f371b5a62a609c2a906d47321f318e6cd5
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector at ttraff.ru. This indicates a likely attempt to lead the user to malicious content through a link farm, possibly for SEO poisoning or phishing. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=starfinder+armor+upgrades
    • http://files.ldbeng.com/uploads/1/3/0/9/130969548/6746784.pdf
    • http://files.l912f.org/uploads/1/3/1/6/131636807/todawowidexit-fireniv.pdf
    • http://files.catalystfundraising.com/uploads/1/3/2/7/132740172/4752732.pdf
    • http://files.batterypro1.com/uploads/1/3/0/8/130874610/6628389.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/molukozofarokasaputax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/ap_varus_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/zeguju.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/wagexowet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/bugupofezotapezokavodebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/13412061754.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/jibunidilero.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/50390277116.pdf
    • https://cdn.shopify.com/s/files/1/0429/9289/4105/files/33887638963.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/zuwarosewavabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/remote_disk_on_mac.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_off00008546.bin
08a18f57ffa6fb84be91267a3d45f3c6ad27dbc0734042efeda03ef0fc99da98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8546 5432 bytes
font_01_sfnt_off000097af.bin
f59e049fb8aa445e6cfc519120d7420ef4dbba651b2ce535ac5b0b7731c82d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AF 10140 bytes

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