Malicious PDF — malware analysis report

Static analysis result for SHA-256 4397f8c01e246728…

MALICIOUS

PDF

37.0 KB Created: 2020-08-09 18:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 126e7f011b11d18953fef8f1861c7c53 SHA-1: 8453d63ddfc2db49320f2be68242da17b27ce268 SHA-256: 4397f8c01e246728e680449df76400410c3291d53f56da5c18c6151b7b3ba066
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. This indicates the document is designed to lure users to a potentially harmful website. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted from this sample.

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=seventh+day+adventist+bible+commentary+vol+4+pdf
    • http://files.lennoxwarner.com/uploads/1/3/1/3/131398362/e12d70e193336.pdf
    • http://rasavugi.aristotelisd.com/uploads/1/3/1/3/131380213/mapodumesamukaxat.pdf
    • http://files.sosinsuranceagencies.com/uploads/1/3/0/8/130814529/d2fb19.pdf
    • http://vejenu.checklistinspections.com/uploads/1/3/1/3/131379578/jasil-zowedage-xojosufomejikeg.pdf
    • http://files.moenkopimemories.org/uploads/1/3/0/9/130969424/xusutijerijiride.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/46151830400.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/83635821058.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/dokucraft_resource_pack.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/gonotazuluvufogelonabolet.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/39846904090.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/show_my_homework.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/26003394807.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/66152958015.pdf
    • https://cdn.shopify.com/s/files/1/0432/6408/2073/files/sap_basis_black_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/womikevazafibevaruduxe.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/maltese_falcon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/48462480911.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_off000050c3.bin
ee7ef73c6af7def2ce9510742849b1a682ed65cba0bc8c3b46b486ad5d92098b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50C3 5888 bytes
font_01_sfnt_off000064b4.bin
86a9456a8dd760921b93eef2a5099e194868552378a309d117c8c741c483e039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 10008 bytes

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