Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ecb742df511577…

MALICIOUS

PDF

48.3 KB Created: 2020-08-07 09:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b33fccda782275cd1084c8cfe6eb2985 SHA-1: 1b9d4aa1957792a7f2845b82e8038ea0f7a7f2bc SHA-256: 55ecb742df511577239c553b1032b0b3971c1efe89c32a470bdea7efe34bff9f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=gmp+pharmaceutical+industry+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. 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/pify?keyword=gmp+pharmaceutical+industry+pdf
    • http://files.ps115jamesjambrose.org/uploads/1/3/1/4/131437983/3657296.pdf
    • http://files.wemplephoto.com/uploads/1/3/1/4/131454620/0e2ce5e8.pdf
    • http://finowodoz.willetslab.com/uploads/1/3/0/7/130738714/mixejinizumo_togesupetibalof_jofuxirod_nesoda.pdf
    • http://files.ibomusicalvoyage.com/uploads/1/3/1/4/131453198/dekafode.pdf
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/athoms_mbuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soparuvuridove.pdf
    • https://cdn.shopify.com/s/files/1/0448/1410/6775/files/camera_scanner_to_tapscanner_v2._0._47.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/75396031763.pdf
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/husky_60_gallon_air_compressor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/mudotofun.pdf
    • https://cdn.shopify.com/s/files/1/0434/9670/2104/files/nevadusisimeloxewukanigis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/85490674543.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/47273314496.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/dififelowezato.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1118/files/26402577102.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/41582735723.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000714b.bin
968ac5b98d12a1d237d32421d19e1bd0397ce549b7576c7942fdcf50e370bf13
pdf-font-stream PDF embedded font (sfnt) at offset 0x714B 5300 bytes
font_01_sfnt_off00008330.bin
3486eb0f16c26b02a02e95db20712deb63adffb395956b4c9d7e615dde470c8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8330 10108 bytes
font_02_sfnt_off0000a5af.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AF 4324 bytes