Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80b4167d87fbc0a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-12 09:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28be836fd9ba26ab11e12d5b8cf256d SHA-1: 7ccaaf8293d160ef4f1ddd34c7248fb45573ef8e SHA-256: c80b4167d87fbc0a1b8301360d08f0d96ebf6fbe97b718701efb3bb52a9cd1ea
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.ru' is flagged as a malicious redirector. The document body, though corrupted, contains text related to 'ias sociology optional syllabus pdf', suggesting a lure to disguise the malicious link. 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.ru/pify?keyword=ias+sociology+optional+syllabus+pdf
    • http://files.aliahjan.co.nz/uploads/1/3/0/8/130814104/8e329f3a01.pdf
    • http://files.scafone.com/uploads/1/3/1/8/131856365/9072880.pdf
    • http://files.plantsandponytails.com/uploads/1/3/1/4/131437657/9962222.pdf
    • http://files.vicksburgbands.com/uploads/1/3/1/6/131636692/7891618.pdf
    • http://files.stalbanstpetebeach.org/uploads/1/3/1/3/131384101/vibisetefizugora.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/husqvarna_455_rancher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/3983/0695/files/gears_of_war_4_multiplayer_tips.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/texulukuma.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/gulatetewuvusoruguva.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/dabuwexotevuxidimiwevefed.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/buzofuji.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0507/files/30801882466.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokukivovasogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0103/files/xadorumuso.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/boy_scout_handbook_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/77501399778.pdf
    • https://cdn.shopify.com/s/files/1/0440/3019/7910/files/punaxatutasolizute.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_off0000716e.bin
bb97521f3d71bbfe3e9a70cc99d3001a299ee7c04165a8c7abccaf2d348c19c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716E 5408 bytes
font_01_sfnt_off000083e5.bin
60339a669049e56be9172ec19ce3f8eee2d02abc9ede12c34e95f5e10489f949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E5 9852 bytes

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