Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e393bb1a5d7f036…

MALICIOUS

PDF

59.9 KB Created: 2020-08-21 15:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ab47d25eb081783859987dc75326a3d SHA-1: e0c2084cfae9e60cb26f0e2cdd3bfcb70780a931 SHA-256: 5e393bb1a5d7f036b1a7aadcf4473df83640caa89c2e566fdfabc7fb727218aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) and then to various PDF files hosted on Shopify and other domains. This behavior is indicative of a link farm designed to distribute malicious content or phish for credentials. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ampere+pro+apk+3.+17
    • http://files.badassgirlworldshop.com/uploads/1/3/0/8/130814235/baa6b1c3661.pdf
    • http://gujam.coppleswesterncape.ca/uploads/1/3/1/4/131437987/7d16b.pdf
    • http://files.tuckerdevotions.com/uploads/1/3/0/9/130969446/jowibelemumovit_mavisu_sinaxal.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/bitudovarikabaronepe.pdf
    • https://cdn.shopify.com/s/files/1/0447/5250/2935/files/28923048886.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/97019591244.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/fesezuziliwefalidoxejije.pdf
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/sofezekojobov.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/android_studio_find_jdk_path.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/denuvojugokafarujas.pdf
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/inorganic_chemistry_miessler.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/vafipuzowojefa.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/
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000079f9.bin
6baee300663436f1b3382affdf077086960b91623e918d0b8633b977e72076d5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x79F9 14132 bytes
font_00_sfnt_off0000688d.bin
2718861f01ea80dbd4d8ca2d8ba1768935d1b916bb5929c4b8718b6b8ee0287d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688D 5136 bytes
font_02_sfnt_off0000a195.bin
2721843b625925e9c9e75a2c0f8362c8a6e212caf9ca12bf06f48bc51cabfd48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA195 13744 bytes
font_03_sfnt_off0000cd93.bin
5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD93 16068 bytes

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