Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0b73c3e6f1e6e9…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 01:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7036476d32bda48efba757062cffba2b SHA-1: 369341aee003e745c5841eaacb0007af9507f943 SHA-256: 6c0b73c3e6f1e6e9c92deae7a9640748fba5180c06e996e85fe9c8d6cb640df8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=assinar+pdf+online+com+certificado+digital', is identified as a malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise or phishing attempts.

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=assinar+pdf+online+com+certificado+digital
    • http://files.myrnaburksfineart.com/uploads/1/3/2/7/132712180/xetanawuxet.pdf
    • http://files.karlhjohnsonphotography.com/uploads/1/3/1/4/131407086/2720127.pdf
    • http://files.remodelingirvineoc.com/uploads/1/3/0/9/130969456/xosofudulinete_sabudomixa_pokamobo_siwekefa.pdf
    • http://files.markzurawinskimusic.com/uploads/1/3/1/6/131637562/d02eeb649f600.pdf
    • http://files.galleryatno6.co.uk/uploads/1/3/1/4/131406885/vorafebaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/xogofuves.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/16342255828.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/23047971698.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/52390819683.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/xoroxobezazafatojedupudip.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/68484449178.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94430640368.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/85580203273.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/gipoganufezusuripafiduti.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/pasitofujeleb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/zimajijatufavawodafa.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_off00006097.bin
62e8fb908c861d7f4df628a03aa2f8de30d1ef1cea42cc981421266e68064e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 5464 bytes
font_01_sfnt_off00007311.bin
61a164b1392543864267a81ed494bb88a736e3a49fdbf64007c2295011d5e5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 9992 bytes

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