Malicious PDF — malware analysis report

Static analysis result for SHA-256 963a8aa15b6b7bf6…

MALICIOUS

PDF

79.5 KB Created: 2020-08-06 17:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e846c7a5b62bdcf189c0633369f146 SHA-1: f3573c4e4523a94f311e03e27342d6c20ff9571d SHA-256: 963a8aa15b6b7bf65afb49bfb971777b4dde93a95a5c99d7d235fa67fead1dcc
120 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. One of the primary links points to a known malicious redirector at 'ttraff.cc', which is designed to funnel users to further malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=shinjuku+station+map+pdf', indicating the document's intent to lure users to this malicious domain. The presence of numerous benign-looking Shopify links is likely a tactic to mask the malicious redirector.

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=shinjuku+station+map+pdf
    • http://files.highpeaks1stgrade.com/uploads/1/3/0/9/130969709/4b911.pdf
    • http://files.liguangyi.com/uploads/1/3/2/3/132302960/leramexosodi.pdf
    • http://files.sternulaba.org/uploads/1/3/0/9/130969440/1045984.pdf
    • http://files.mitzimileskubota.com/uploads/1/3/1/3/131384101/1509344.pdf
    • http://lasesose.pennypinchingmomma.com/uploads/1/3/1/4/131453247/79cfc038c2b.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/wuravuditojox.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/4840928592.pdf
    • https://cdn.shopify.com/s/files/1/0434/2064/7576/files/25979483538.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/gegides.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/44984899690.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/u._s._customs_broker_license_examination_preparation_guide_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/remove_mosaic_blur_sims_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/3472/8853/files/molecular_driving_forces_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/fivotegexuputomevapitata.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/nesogufemunusezeresufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/bebuvomafipuzopulivi.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_off00009e17.bin
55c7268dfcc05e2c9553fd509100d4972a2a33f889e4ae3c4b78b0980ed4e35e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E17 21252 bytes
font_01_sfnt_off0000e0d6.bin
2039083d0f8e438c45d983caf41f2db6dffc0a9fffebca6d033222488b87a603		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 5160 bytes
font_02_sfnt_off0000f224.bin
de81ade2ff56af591b62dcb84c38ba6be00956355e8dc425e7c8c7bb6220932f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 15192 bytes
font_03_sfnt_off0001209c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1209C 4324 bytes

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