Malicious PDF — malware analysis report

Static analysis result for SHA-256 3178571233b49027…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 14:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736579083cdf8ee9cb0cfe735f5a8c5d SHA-1: c4f98ed4b23463d34e0137a2e1e78a687440322c SHA-256: 3178571233b49027473a6eac7fd7d48e73973d28c354543d834b3d9c72152d8b
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the text 'Effective audit report writing pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link.

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=effective+audit+report+writing+pdf
    • http://nifazik.autismconsultnc.com/uploads/1/3/0/8/130874655/f6f2ec62cc76.pdf
    • http://files.kandgmakeit.com/uploads/1/3/0/7/130739060/balalagelagufo.pdf
    • http://files.abrushwithnature.studio/uploads/1/3/1/4/131406885/184799.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/achondroplasia_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/bullet_force_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/8579454736.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/40876443440.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/46804156390.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6074/files/nuketesusalapapufojinim.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/garevejarenozag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8238/files/vifanajixomiponus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6257/4750/files/60507759661.pdf
    • https://cdn.shopify.com/s/files/1/0447/1151/0170/files/diagnostico_cancer_de_esofago.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/24753169259.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_off00007328.bin
a41ec2693ce236fa63f50c3db6c964fdd839f821a71d31fb52d71c73f6d19b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7328 5220 bytes
font_01_sfnt_off00008520.bin
e29a000d48a47370b83dc2748b282e115075b497f8f96e96541abb5f04a57ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8520 10420 bytes

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