Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef25d480aa3aafb…

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 03:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92baf4878be4f426d480b882d370ce12 SHA-1: 24437c2cc9d09700b80542be78ff0e8492bd8a8e SHA-256: 8ef25d480aa3aafbe745ba0904f00a2c4b4ef14771e23f93a28743eece8a9396
120 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting an SEO manipulation or link farm tactic. The primary malicious URL identified is ttraff.ru, which redirects to a page related to 'armas al hombro online'. While the document body contains garbled text, the presence of multiple Shopify-hosted PDF links indicates a pattern of distributing content through legitimate platforms, likely to obscure malicious intent.

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=armas+al+hombro+online
    • https://cdn.shopify.com/s/files/1/0438/1920/4765/files/bumovafumuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/kennewick_police_incident_reports.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/lefebesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/45951295071.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/b7_bolt_torque_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/rizutekowamajivuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9209/0788/files/run_android_emulator_mac_os.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/jivukuloba.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_d3fe0989a0d540258d19aac98ef25609.pdf
    • https://static.usrfiles.com/ugd/b8c837_29a7fe3bc7af4bcd967d8bfe3dc4be32.pdf
    • https://static.usrfiles.com/ugd/238140_f90cc06ccb774148a976a1b402122f7c.pdf
    • https://static.usrfiles.com/ugd/3de8a6_50209b92835e4bf68c55f1263b135f5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_368b52a6506f474486ead39902221bed.pdf
    • https://static.usrfiles.com/ugd/06497e_eda1d51dd503420f81fa5cdc91bfbed5.pdf
    • https://static.usrfiles.com/ugd/735189_35b7e2b4278b41bdbc12eebe2accd8c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ba32c53e07e478bb5d9789dcc64f4a8.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_off000055ff.bin
dee6d4143952bec3f3c6c0f2870ee2f4017fd1724b8983b7a9b8b1ac891afd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FF 5052 bytes
font_01_sfnt_off000066ff.bin
58c2caa47ae52cfb92c90f3ba148dbea96502bd6f3f363b98aca37a4ee1b70c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FF 10712 bytes

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