Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1db399d278bfeb6…

MALICIOUS

PDF

49.5 KB Created: 2020-08-02 07:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae0b488f0d0fa3bb6e338ce08f018068 SHA-1: 4680b1192f835a97d7d6ea848bb6ef030832abbb SHA-256: b1db399d278bfeb6cfbda2c5279ffe50507966c61e3339dc83250f4378492d29
150 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, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same phrase as the redirector URL, indicating a lure.

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/pify?keyword=does+uwu+mean+cute
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdf
    • http://files.lucybellesrainbow.org/uploads/1/3/1/4/131453917/dipubemuvor_rubasirore_wadenofizuwe_jemixubuxepikop.pdf
    • http://files.afeophd.com/uploads/1/3/2/7/132712315/bidatuwejuror.pdf
    • http://files.bubbleytrinkets.com/uploads/1/3/0/9/130969220/4391253.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/fegejadorikow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/jubugifajipajopalodujoxot.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/94812021604.pdf
    • https://cdn.shopify.com/s/files/1/0432/3839/1970/files/puzajemetowevumixogokazit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/vadofodipajuzebane.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/53323853917.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/navy_eval_writer.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/rabega.pdf
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/paxibamepakevedalelosiza.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/15968855651.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/75642066075.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/57284058569.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/99883488809.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693b.bin
1ff0bc2f992f59d543b5b9d62876e3dbec590724b60083bdf71b07468be68022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 3272 bytes
font_01_sfnt_off000074f9.bin
38a485d063063a5c871770bc14bdda361c05e8369f1f123bc6d7cc3c60eeab49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F9 4740 bytes
font_02_sfnt_off00008510.bin
a0b0016b9723534f9cd0c19ac4235efe062adce84566d5e619ff94b0e073b374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8510 10968 bytes
font_03_sfnt_off0000aa88.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA88 4324 bytes

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