Malicious PDF — malware analysis report

Static analysis result for SHA-256 208c3b6c192e3baf…

MALICIOUS

PDF

42.7 KB Created: 2020-09-01 15:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a89940298aab3b3093290c4010b55150 SHA-1: 3c45eee53b3d62fcb033a66a355eadc1ec3a5a94 SHA-256: 208c3b6c192e3baf3292564cb05daf0111ae8c23a748bffe4a80101b1a338552
150 Risk Score

Malware Insights

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

The PDF document contains a link to a redirector URL, which is a common tactic for distributing malicious content. The document body, though partially corrupted, suggests a lure related to 'Gta 5 vehicle warehouse money guide'. The presence of numerous external PDF links, many pointing to benign content on Shopify, indicates a link farm strategy to potentially mask the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=gta+5+vehicle+warehouse+money+guide
    • https://cdn.shopify.com/s/files/1/0438/3493/3398/files/ansi_c_balaguruswamy_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/78043991612.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/78150951455.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0610/files/crayfish_dissection_questions_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c283542dd054f8287c4545160b60715.pdf
    • https://static.usrfiles.com/ugd/69695d_95e2a7c75a024770aff34600ba4bca4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f04eb3c6174e24a59b6dc512d92d35.pdf
    • https://static.usrfiles.com/ugd/52b593_3fb0f8f29c6f4434a20b876c535e88b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dedc56197484533b1324d7af58c9926.pdf
    • https://static.usrfiles.com/ugd/b85eb0_6badccb28b2c4929b970856bb7e02ece.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4459/files/tipos_de_accidentes_de_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/resume_templates_generator.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9623/files/ayushman_bharat_yojana_gujarati_download.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_off000067d1.bin
2f98b55a63bad1d234fe0bb2cdf7ced935bdf3c4f1308e4f5dbd5e2876b5fec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 5760 bytes
font_01_sfnt_off00007b61.bin
19c08b1636f04c5dc124a909bff2a2d46795ee94af11803cdf7ff22060a39aaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B61 10152 bytes

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