Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15c94a72a0cd6b2…

MALICIOUS

PDF

35.0 KB Created: 2020-08-20 12:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab31d34f1d4129d779021a4dfa722fad SHA-1: ca09c13b72e97d4757c33a4858b9101989c112e4 SHA-256: b15c94a72a0cd6b23b0113b21f2b761b2560ead6cf668316da35fc1bade4fcdc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. Additionally, a PDF SEO link farm heuristic indicates the presence of numerous external links, with the first one being to a Shopify URL. The ML classifier 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.com/pify?keyword=baila+morena+zucchero+sheet+music
    • http://files.newportrecreation.org/uploads/1/3/0/7/130776682/6027777.pdf
    • http://lofejiru.bantrybayponytrekking.com/uploads/1/3/1/4/131438860/wixun-kazetav-juvavenokulak-legudutidomez.pdf
    • http://files.sydneyinsightmeditators.org/uploads/1/3/1/3/131398095/zolesifufurezevijuz.pdf
    • http://gajer.lisacorbit.com/uploads/1/3/0/7/130740169/bb646.pdf
    • http://files.reconmetal.com/uploads/1/3/1/3/131379844/jakazogitubeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/chemistry_in_context_7th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/79268900275.pdf
    • https://cdn.shopify.com/s/files/1/0433/4963/9327/files/51575433999.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/atharva_veda_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/bogewekabidof.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/20951377468.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/sugogegagag.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/lesenolapevarit.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/resezegelazavaxuxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/33628973845.pdf
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/38122666547.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_off0000491e.bin
e7358d442c3c9bb33b47545281b74b0edb3bc5540822978a846c1660d7d17a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x491E 5140 bytes
font_01_sfnt_off00005a66.bin
a9e2b9d61a3015922ac0128d3f1e18ad2d480188422d35f29b9e5812e238b951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A66 11336 bytes

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