Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66e5d7e5e88394d…

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 14:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df0526e5c9a7955f1a56c5a43c7f3cbe SHA-1: 5f5d21b557c31ffb083f405134d572a65da5b20e SHA-256: e66e5d7e5e88394d213b98ad738a95d0303ba17af81a097461e85fba278858c5
152 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, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous links, including one pointing to 'ttraff.me', strongly suggests an attempt to lure users to malicious sites. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of specific 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.me/wix?keyword=excel+vba+european+date+format
    • https://static.usrfiles.com/ugd/e42ee3_325fa81eafa846eaa4650af4d1e7dd62.pdf
    • https://static.usrfiles.com/ugd/18122d_2e5ae082fe6a4af495ca96e4d02fc5ac.pdf
    • https://static.usrfiles.com/ugd/ddb60a_32668563ac4444ffbd9ea63ff7ae9146.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef332902125d44f09dab24f6d572cbe8.pdf
    • https://static.usrfiles.com/ugd/3615fb_bcd45c669ff54004b049781df4d35c5f.pdf
    • https://static.usrfiles.com/ugd/37428b_2827f6763e674b0f8e321f341abb4633.pdf
    • https://static.usrfiles.com/ugd/a2d007_9e00184c27464b7286b1b2d5ad3a581c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c4e3d1d74f947e1ae4d67666191a89f.pdf
    • https://static.usrfiles.com/ugd/6203b9_dba67ee1ac274597b923160d24cb59a3.pdf
    • https://cdn.shopify.com/s/files/1/0436/7679/5030/files/22826976344.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/94564473342.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/78625218083.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/blood_money_hd_video_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/91677818834.pdf
    • https://cdn.shopify.com/s/files/1/0449/5153/5771/files/alkanes_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/halfords_mountain_bike_frame_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/zaxewujefaraluzow.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_off0000643b.bin
5472705ca113b035276f85b1714c378259f6a186776f2672a4f7d441067da78d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 5348 bytes
font_01_sfnt_off00007661.bin
1d120a513808be4d3a57833688dac33e3e8ee7acb14898efe64794829afb9c79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 10204 bytes

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