Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0275ceb9b88911…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 10:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e39970083a26f307dbd9349c2ef0df2 SHA-1: 6077cc707b8581119a534e03a618d74e8ce56cef SHA-256: 2c0275ceb9b88911efa1b115fe9d0320f81ae070245311a354ac9e4f2c6261b8
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves to obscure the ultimate destination of the attack. Another heuristic noted a large farm of external PDF links, with the first pointing to a Shopify domain. The document body contains garbled text but includes the suspicious URL and a benign-looking PDF URL.

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=agonarch+abyss+eggs
    • http://files.dietaryapothecary.com/uploads/1/3/0/8/130873728/2694707.pdf
    • http://files.gentlemamaholisticmidwifery.com/uploads/1/3/2/6/132695586/1738473.pdf
    • http://files.southernpreowned.com/uploads/1/3/0/7/130775387/9053662.pdf
    • http://files.lyonskinder.com/uploads/1/3/1/6/131606396/lakevave-siruxaxora.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/nafisifik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/93124290651.pdf
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/66032567079.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/xuvulijigusurapoxuxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1594/3845/files/case_1840_specs.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/xevor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/tuzuwakafidabozes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/43294259918.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/dojeribivotofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/waxulelemurofilefiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/rincon_surf_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/14398098969.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/ravegafuze.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a3.bin
1ae07d2e44c9f4b3a7d7752d37a7c3a69809470cc1a63799984278061b6aeb3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A3 4920 bytes
font_01_sfnt_off00007744.bin
1df6bf8ff9436d968deba26b69f741322901e463999089d39ed99db00b1cb1e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 10240 bytes
font_02_sfnt_off00009a59.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A59 4324 bytes

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