Malicious PDF — malware analysis report

Static analysis result for SHA-256 477de5705c477a9c…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 11:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00059ec23053405996865d55d15ee392 SHA-1: f931d10897bfb6d6977934361353c98bc51c012b SHA-256: 477de5705c477a9c4d3eb5063f30b42a5b18c6da4f8d71dfaaef1847a5b7b422
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=dosha+quiz+pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external PDF links suggests a link farm or a mechanism to distribute further malicious content. The ML classifier also 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=dosha+quiz+pdf
    • http://files.art35n.org/uploads/1/3/2/6/132681488/gurapeverusisop.pdf
    • http://tisigorib.sayrevillesquad.org/uploads/1/3/0/8/130873951/fuvimiju.pdf
    • http://files.mazarchery.com/uploads/1/3/2/6/132682134/9294203.pdf
    • http://mexoti.mosaicjusticenetwork.org/uploads/1/3/1/3/131383791/7b25547f2800.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7389/files/brutal_doom_hell_on_earth.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/papilewom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/35981708003.pdf
    • https://cdn.shopify.com/s/files/1/0438/3480/2333/files/bikifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/60407660928.pdf
    • https://cdn.shopify.com/s/files/1/0443/0469/5452/files/el_escepticismo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0154/files/faborifuzaderujojo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/85762890086.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/kupavajesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/79088180793.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/18870689673.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_off000074d4.bin
02688c15c32e5fe6e93fddece117ab6828f686626e7a100780c9fe0446707cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 5176 bytes
font_01_sfnt_off0000867e.bin
b9d8b93c09091b007b225a61ef91cd27604a4e5652d9f9d88cec3cb0134fb053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867E 10180 bytes

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