Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34b61133967d845…

MALICIOUS

PDF

52.7 KB Created: 2020-08-21 01:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d10a63dda89315d7f60f92ed6154e7 SHA-1: dccac852ad9078869a94c21bd26aad1282f6e73b SHA-256: e34b61133967d845fb6625a44c034e9b05ee7f5e6d305f18321fb830b5c2f6de
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com). The document body, though heavily obfuscated, contains the target URL and appears to be a lure. The presence of a malicious redirector link and a link farm heuristic strongly suggests this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=approach+song++by+amit
    • http://files.northernillinoisfootandankle.com/uploads/1/3/1/3/131384573/5285262.pdf
    • http://files.tribechrist.com/uploads/1/3/2/6/132681295/jizefikerodufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/78931611561.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/gazafirisatewovel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9043/files/fran_bow_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/zolodavitonugakif.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/adoption_paternity_leave_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/occupational_safety_health.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/83526914834.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/java_codes_games.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/paradise_lost_book_9_modern_english.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000542a.bin
53ecec9b47982ea568b60ed92850d1e10f7e3210217fc0381d180b4fcc78f4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542A 5216 bytes
font_01_sfnt_off000065ac.bin
2346ed736df67bd53661f009fa738bf3743b368d07aa716a60c6f6fd9f8818fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AC 2676 bytes
font_02_sfnt_off00007118.bin
dd6d0d18bb44eae8a20d0aadcf6d67e7ffdb8892027426cb297bcd893b030e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7118 15556 bytes
font_03_sfnt_off0000a13d.bin
06d84a79787f49517cba9647d12dd77c675544b9e46e70dbd0c3ec2b8d2a160e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA13D 16132 bytes
font_04_sfnt_off0000b636.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB636 4324 bytes

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