Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7dcefbabb98d53…

MALICIOUS

PDF

42.3 KB Created: 2020-08-01 05:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 614cb17567b13de292a480b1f7ad4ff9 SHA-1: 2784f20cb463b1883756c284f3a342668d9da70b SHA-256: 6b7dcefbabb98d534807d2b658906cb814f1eeb79738211b10dbc370153bf462
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 or SEO poisoning tactic. One prominent link, 'https://ttraff.ru/pify?keyword=vista+32fb+pdf', is flagged as a known malicious redirector. This indicates the document's primary purpose is to lure users into clicking malicious links, likely leading to further compromise.

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.ru/pify?keyword=vista+32fb+pdf
    • http://files.bodybycookie.com/uploads/1/3/1/0/131070336/gisupuwevavokigu.pdf
    • http://files.davewallheating.com/uploads/1/3/1/3/131398369/5320992.pdf
    • http://files.eleatdiningclub.com/uploads/1/3/1/6/131607310/f48dda41005ab34.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/rudipalerofezesevax.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/52868006082.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/48050100609.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/foxezawidesimamuzasaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3142/0319/files/divowamejuguvuxefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/49952247225.pdf
    • https://cdn.shopify.com/s/files/1/0432/9996/3044/files/xibubapokivawenofef.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/tunijuxuvaxazutaxopal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7282/3202/files/ditimatawawegobab.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/66078274178.pdf
    • https://cdn.shopify.com/s/files/1/0438/4312/5405/files/89933067265.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/gadedebedidisufumuvezopas.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/26500731274.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a2c.bin
f0b8aa9bfb193ba7abd13a60b84e3cba1068b9d9d4f53e6f4ca328c13b90d79e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2C 5308 bytes
font_01_sfnt_off00005c42.bin
6c37ab8248c28b7c18446f5bb8eba5751eb180e9ae03c02389d39739dc3ad922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C42 9852 bytes
font_02_sfnt_off000077b2.bin
470daab22710b0a9ac3c32f84e39887a62f401dc858981c0bec9543472243007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 10016 bytes

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