Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6bbcb68cc5daaa…

MALICIOUS

PDF

53.1 KB Created: 2020-08-18 23:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72ffbeaacd4d1495c470f3acbad9be3 SHA-1: e5068e292a816e6e241213dc17e7a093f6fa3a38 SHA-256: 1f6bbcb68cc5daaad1e6a7ab018eb2ee9f2a06b965bbbaa2abf1425a31807aa7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL pointing to ttraff.com, indicating a malicious redirector. The ML classifier also strongly suggests maliciousness. The embedded URLs are likely part of a lure to drive traffic to malicious infrastructure.

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=jalaram+amritwani++audio
    • http://files.seizediem.com/uploads/1/3/1/4/131438741/vewim_gifesimefipotu.pdf
    • http://xekeko.switzerland-county.com/uploads/1/3/2/7/132710712/bufogitupoma_kozopafod_savisiwomefi.pdf
    • http://dupowewiw.relentlessperformance.org/uploads/1/3/0/7/130738546/7595502.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/pivarezapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/xibabadegavin.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/koxodunemarogotozidupikek.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/zofonesavuzexofizotap.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/roviximupitunidesojigelil.pdf
    • https://cdn.shopify.com/s/files/1/0429/4256/2460/files/jixivina.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/towavap.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/25562983408.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/tupafapuzu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006929.bin
8ce67be350739a4f3de191ad306d3f08abfb29d24fcdd8c0b4d0203e34ed686f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 4640 bytes
font_01_sfnt_off000078c8.bin
b5f1b3f1c6b0d36d9813011a9f98d8ebe7e64376562ea64bbbb09e702db5c0d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 4840 bytes
font_02_sfnt_off0000882b.bin
0f51e3a69cdff4cac532dc717645e4b8e941a8ba47de158010810c74a008684b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882B 15116 bytes
font_03_sfnt_off0000b7aa.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AA 4324 bytes

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