Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee6f95ccab36030…

MALICIOUS

PDF

62.9 KB Created: 2020-08-05 04:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d08e667a41a1638edbc18ab588f82197 SHA-1: df27b0c6772e60332bd7b366c4f0d3f18534784b SHA-256: 2ee6f95ccab360303f9773e336f510d7535136029f536b5f8778b3ff473a3daf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure related to financial accounting standards. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy.

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=financial+accounting+standards+board+pdf
    • http://files.thecharlie2323.com/uploads/1/3/0/7/130739369/2800536.pdf
    • http://files.ibunson.com/uploads/1/3/0/8/130814043/1582626.pdf
    • http://files.michalrutkowski.eu/uploads/1/3/1/8/131856907/e59c3e13870aa8c.pdf
    • http://files.michalrutkowski.eu/uploads/1/3/1/8/1
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/6000499614.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/80266478352.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/jeep_cherokee_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/cfm56_7b_engines.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/83988783767.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/vcut_dili_kitab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/42971646667.pdf
    • https://cdn.shopify.com/s/files/1/0430/8067/9577/files/how_to_center_an_image_in_css.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/wilogadoxosuwiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/10597165790.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/46145650711.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/71586488837.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_off0000a382.bin
ba83464db75a8fb814c21937646ad94c4ea6bd859064da5a80b5d03d2d3a2d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA382 5184 bytes
font_01_sfnt_off0000b51a.bin
dacfb2e7f5e7b8c689d9bb78cd29a3e77cfb9c99febd5f9be3a95851da637e35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB51A 13260 bytes
font_02_sfnt_off0000de38.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE38 4324 bytes

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