Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc795a8b7575a282…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 23:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4f24125963e96879f36cb59b907b3a1 SHA-1: 8aa5677ab57c5075db8347260e2ceb00cd567fde SHA-256: cc795a8b7575a282d5f4d7d5c26381a88fd5022b5e7d31d1b96a0cafdf4dd5bf
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains the malicious URL and references to other PDF files, suggesting a lure to external content, likely malicious.

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.cc/wix?keyword=skyrim+change+spouse+clothes+xbox+one
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/zenowomeligoxufofuvam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/85591705025.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/dijonewupamujosiwowujun.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/12686489641.pdf
    • https://static.usrfiles.com/ugd/b52961_0bd9565662944bbba13c9809c21cd552.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_405a9ea09e9548f182427b24a4d81b2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://static.usrfiles.com/ugd/8b2c09_cfdf030607c04b49b912c68d0511f321.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/xofugudinokafozipage.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/senior_apperception_test_in_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/on_the_road_again_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/76003617043.pdf
    • https://cdn.shopify.com/s/files/1/0460/0001/3479/files/texas_commercial_vehicle_inspection_report.pdf
    • https://static.usrfiles.com/ugd/0c268c_6e647820b44f48348e46585eb5a64e71.pdf
    • https://static.usrfiles.com/ugd/b52961_590f5033b54e40db99a0a0a2c440ec9d.pdf
    • https://static.usrfiles.com/ugd/2486b5_d08c245168ab4047ae7a6d57ca6541c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_75bee5003aae441fa7180ee3df48be7c.pdf
    • https://static.usrfiles.com/ugd/affaa6_657e6cefa26645f2822ee42657072722.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_off00005a96.bin
81bc575034d6822d890258ac5fb8c4358e70c0c1d6249177a8554c2b8e533dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A96 5824 bytes
font_01_sfnt_off00006e44.bin
9995aab90922ce83f0c728faf634cd733aa08a429db89a01b54783e7dabfd43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 10220 bytes

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