Malicious PDF — malware analysis report

Static analysis result for SHA-256 a385c3d0a53dda63…

MALICIOUS

PDF

45.1 KB Created: 2020-08-13 21:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97c1e9b6d4d0e470e2614c549044cba5 SHA-1: 81b0dc72ce1ff872317d81effb6995c2d3fcfec0 SHA-256: a385c3d0a53dda632c767150a567eced5d6ed3b431a82192e542766da7884674
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'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many hosted on shopify.com. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect users to potentially harmful content.

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=aararum+kanathe+duet+song
    • http://soguzenob.dkuntz.com/uploads/1/3/2/8/132816202/duwimofudu-fonodejojota.pdf
    • http://files.mitchlangcaster-james.com/uploads/1/3/1/3/131383657/4293526.pdf
    • http://files.gmif.gmuforensics.org/uploads/1/3/1/3/131382346/1927854.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/factorio_bus_balancer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0728/files/latterof_good_caracter_moral.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/flame_orb_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/bivodawar.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/55313096998.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/cheddar_gorge_walk.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8493/files/pojaxanusedorapobinijub.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/accessibility_for_ontarians_with_disabilities_act.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/sifeb.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/
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/55313096998

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000718b.bin
e8f9ebb6839edc1dc1e9002ef7105bfc1fbe1c359bb12760f1026335346b1cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 5260 bytes
font_01_sfnt_off0000833b.bin
0fa14b6f333969ac888fbf1b9e4267948a5044c4c7222f75629a5f4e543063e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833B 11116 bytes

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