Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9bcc086e086fbe…

MALICIOUS

PDF

42.2 KB Created: 2020-08-05 06:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70a600e436cf7152ef999a3d3c0ae863 SHA-1: 6f93562f90653f3ae0aa662ec46e762c392c351b SHA-256: 0b9bcc086e086fbecea1f2b1af02ea94275acec3042c39294219c5c2407a8b87
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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=modelo+canvas+pdf+que+es'. This indicates the document's primary purpose is to direct users to potentially harmful external sites.

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.com/pify?keyword=modelo+canvas+pdf+que+es
    • http://files.outfitformulacapsulewardrobe.com/uploads/1/3/0/7/130739043/sotupakopifupo-sapelipugiteduv-jagogisomufib.pdf
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdf
    • http://files.moodmetals.com/uploads/1/3/0/7/130740538/gotexulonosoji.pdf
    • http://files.iconiacapital.com/uploads/1/3/2/7/132740494/3244ce9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4206/8887/files/police_communications_technician.pdf
    • https://cdn.shopify.com/s/files/1/0432/9478/5694/files/24753708739.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/31071533728.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/arrancame_la_vida_libro_angeles_mastretta.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/86558160972.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/19699005678.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/furimadezirafomoxed.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/dell_r710_specs.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/9190224875.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4496/files/nudipasizobalodev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/88321221709.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/41103189657.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/lakakikuvivotefime.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/wuluzagax.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006702.bin
f68a9963906d47fb9b5fbc9d50b471ff577abfd3f3343334eabb5a3251b06782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6702 5244 bytes
font_01_sfnt_off00007902.bin
58cae88539e97d908f24bd4e269037e112d711528cdb08615563f1011ddae826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7902 10076 bytes

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