Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c4848272407ce8…

MALICIOUS

PDF

37.6 KB Created: 2020-08-02 14:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a36faf261c66cf26f8dee797df41d743 SHA-1: fbd67934e211ddfccca2cd6899124a3ee2667294 SHA-256: b3c4848272407ce8fb09da5be51c4d0ac12d8427aeb62896b2369ea3c45f621d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, `https://ttraff.cc/pify?keyword=matricom+controller+manual`. The document body, though heavily obfuscated, contains text related to a 'Matricom controller manual', suggesting a lure to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

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=matricom+controller+manual
    • http://files.prep64.net/uploads/1/3/1/3/131383727/jozosup.pdf
    • http://files.weednm.org/uploads/1/3/1/6/131637656/gikofi-kufapegarup-nidivosizuxata-vejegavabiwajep.pdf
    • http://files.alvarezorganic.com/uploads/1/3/0/9/130969682/papanu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/naruto_shippuden_the_movie_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/82947206345.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogudanivivakow.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/gplayer_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6972/files/rawagusagasebizamo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/80393108832.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/73505583841.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/dezugawuwatuzalug.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/zekezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7249/files/kawumafopuvegefulolebedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/876446046.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_off000056e7.bin
addf6646f999c9b431682b223cf0fa486b3bf578d7976ad9b5dfa522c0d456cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E7 4772 bytes
font_01_sfnt_off00006711.bin
33d9b922c925079d581a3e7341ce9e0b942435ec17cf301eea377c13aeb074d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6711 10196 bytes

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