Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdc19e50e7e46bd…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 13:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 791c7164a51a57ee99777bc1d75d4529 SHA-1: 80fe909a3196d93d51c0e403b9b27da4c6bcde34 SHA-256: 8cdc19e50e7e46bdc590c4553f51a7a58babc191ebeb3b46478553f18557144f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/wix?keyword=cold+frame+plans+woodworking'. The document body, though heavily obfuscated, contains text related to 'cold frame plans woodworking', suggesting a lure to entice users to click the malicious link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation to distribute the malicious content.

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.ru/wix?keyword=cold+frame+plans+woodworking
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/46495081901.pdf
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/41572997872.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/vatexanesafipesarukorat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/nvidia_turn_off_vsync.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7435/files/smadav_antivirus_2018_free_with_crack.pdf
    • https://cdn.shopify.com/s/files/1/0436/2544/7587/files/9824965072.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/zovazixomodagipibipodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/lipid_profile_review.pdf
    • https://cdn.shopify.com/s/files/1/0438/4705/7568/files/nfo_dosyas_ama.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/usg_boral_plasterboard_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/29770395519.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/87530231530.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/burrhus_frederic_skinner_libros.pdf
    • https://cdn.shopify.com/s/files/1/0447/8589/3542/files/53776141809.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_off00005cf8.bin
43be97abe78b897d619e429faef400cebe55b893017d1b93f4d22217c5f8ba64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF8 5424 bytes
font_01_sfnt_off00006f60.bin
294d161830b87ee28623cc67954e71e31b28fbac1141ea4a8b954b8f8b87a486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 10412 bytes

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