Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2ed960e805de61…

MALICIOUS

PDF

78.2 KB Created: 2020-08-04 06:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e5f6b9d02ffa9dd62e28465e34b03c2 SHA-1: d3d5f156e583f51e66eb9030531245586418a6a8 SHA-256: dc2ed960e805de61a9713508be53a93651a66ae698f9c99a52d82ca45344e1bb
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to a 'Farsi language course pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further indicates a malicious intent to distribute content or redirect users.

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=farsi+language+course+pdf
    • http://files.dogamelbourne.com/uploads/1/3/0/8/130814124/9566204.pdf
    • http://files.grissomvb.net/uploads/1/3/1/4/131454556/fawiwaj.pdf
    • http://files.lafontanabocaraton.com/uploads/1/3/2/3/132302830/f65da56cc2.pdf
    • http://files.joannblock.com/uploads/1/3/0/7/130776065/tunujej_bixozuf.pdf
    • http://files.jaydaitkaci.com/uploads/1/3/1/3/131384424/bojumapafub.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/11425064930.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/39253597558.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/84887058553.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/xavibofinuxijixepun.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/42876941722.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/makezun.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/xabatidufemisaxejini.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/xogesogefusivit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/76252451665.pdf
    • https://cdn.shopify.com/s/files/1/0440/9258/8184/files/87195640530.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
stream_005_off0000f3d0.bin
690f4d3225da4ea710f0d16c7bf64e5597a2e1e80eec1f80492b6e03e86ae193		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF3D0 24316 bytes
font_00_sfnt_off0000bda9.bin
5e6b9739cf702ff248fc710a770cc95636307d0afa03558b8d039dfee6bb52d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA9 5080 bytes
font_01_sfnt_off0000cef1.bin
8fde7d123771b7e6dd8116125954762ff403317aa10ca2a42cda0af63719f18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 10824 bytes
font_03_sfnt_off00011d70.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D70 4324 bytes

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