Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8073c429dc8981e…

MALICIOUS

PDF

45.3 KB Created: 2020-08-05 15:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3ac49521646a07549f96a55a9d24acc SHA-1: c48ec0c693e3a3e5a5ae086fa8adc5ad48d63a93 SHA-256: c8073c429dc8981eea74c440df47e6ca481a4829e49cc9a6bbc1b5959808079d
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, appears to be a lure related to countries and currencies, aiming to disguise the malicious intent. The presence of a link farm heuristic further suggests a malicious distribution strategy. No scripts were extracted, but the primary attack vector is the redirection to malicious infrastructure.

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=list+of+countries+their+capitals+and+currencies+pdf
    • http://files.coachhousecochins.com/uploads/1/3/0/8/130874296/pesatola-sukow-futaxafupowad.pdf
    • http://files.adcoblue.com/uploads/1/3/1/3/131398475/7ef5440e3830d.pdf
    • http://files.learntoroar.com/uploads/1/3/2/7/132740580/famawoxek-zanunax.pdf
    • http://files.mcsweeneyproductions.com/uploads/1/3/0/7/130740189/e4cc47a.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/bakupagumo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/tubimelexezikuxezox.pdf
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/pasobodovijobapiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bewasovenajuwawofitef.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/48131841586.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/61345978036.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8744/files/wuvowagum.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/adobe_reader_10_offline_installer.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6848/files/betatadokebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/1636916950.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/zuwelapibonozazop.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/cape_girardeau_mo_weather.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_off0000733e.bin
fdab999394bf52b4ba3128d0c243814a61c54923424aed715cf65c7e136f61db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733E 5184 bytes
font_01_sfnt_off000084e1.bin
02ee29c54c1eae531e82237ac5d9c35b9db28b8f5ccd6d0daefdcb86be9ea02b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 10208 bytes

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