Malicious PDF — malware analysis report

Static analysis result for SHA-256 326c83d7242e7336…

MALICIOUS

PDF

39.0 KB Created: 2020-08-19 02:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ab1f4bbf40d3e8056bf4d4d02176e95 SHA-1: de96234c4478b45ab8cae7089b78af53ac814180 SHA-256: 326c83d7242e73364c3a4121034b29d8cf61b6a61390ce4ee59de103a29e9d4c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link farm pointing to redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=open+tee+bioscope+movie, which is likely used to direct users to a malicious payload or phishing site. The document body, though heavily obfuscated, contains this URL and other PDF links, reinforcing the attack pattern of using a seemingly harmless document to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=open+tee+bioscope+movie
    • http://files.6pointfarm.com/uploads/1/3/1/6/131606111/simoxuxagewe.pdf
    • http://kufovojul.ourfathersfarmusa.com/uploads/1/3/0/7/130739964/6088288.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/lugutatinuxituguvabobodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/baahubali_movie_telugu_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/26624758087.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/tewaferujiwudinubedan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8656/8860/files/application_form_for_citizenship_card.pdf
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/abramelin_mage.pdf
    • https://cdn.shopify.com/s/files/1/0438/3640/7973/files/fisebelufosol.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/sanudoxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/belmont_report_educational_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/tugadejabuvalatel.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/febakigidafiwujopoxawuxig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.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_off00004a35.bin
0fe50f56b8d8517a4ffd9a88101b40bad3a4786628eaae64d6a42c58979be326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A35 4968 bytes
font_01_sfnt_off00005b0d.bin
c221640b9f7478fffc58493ca3d2f8874ad50fd7aee1f375b74a217c8bf2970b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0D 5348 bytes
font_02_sfnt_off00006c8d.bin
055252a97c3c7177c8d3627a905b6d4a6767dc2a8c1c783d5ffec5e0adfa6d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8D 10140 bytes

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