Malicious PDF — malware analysis report

Static analysis result for SHA-256 6187d2aa7ac08052…

MALICIOUS

PDF

50.0 KB Created: 2020-08-18 21:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecbb65547686056ed90b142b462fa265 SHA-1: 6d69d25978430716fb6ee2c00c350d8931815121 SHA-256: 6187d2aa7ac08052d68d0bd8c24992d51bc7881a429a03fe2e28cfefe8e26fd5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body and embedded links attempt to lure the user with the pretext of 'bodybuilding abs workout videos free', likely to drive traffic to malicious sites or download further malware. The ML classifier also strongly indicated maliciousness.

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=bodybuilding+abs+workout+videos+free
    • http://gubina.mexicoluminaria.com/uploads/1/3/0/8/130874493/3269185.pdf
    • http://files.caribbeancare.org/uploads/1/3/0/9/130969488/vibabeliv_vemor.pdf
    • http://wuveparil.markdfoxamerrawart.com/uploads/1/3/1/0/131071164/roguxagefululo.pdf
    • http://files.blueboximaginarium.com/uploads/1/3/1/4/131437174/gelorele-gakutef.pdf
    • http://sizamivij.zoewilsonnutrition.com/uploads/1/3/1/6/131606490/gotakesipu-donojokudepa-lenafamijek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/1041461897.pdf
    • https://cdn.shopify.com/s/files/1/0433/1939/4462/files/rakitadopup.pdf
    • https://cdn.shopify.com/s/files/1/0430/3264/1689/files/design_of_aerostatic_bearings_powell.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/american_revolution_timeline_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/19274009337.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/danufopug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/19946823570.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/21842042263.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/69851451873.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/bunabavotewuzimivelofa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6583/files/immunization_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/lumasejugosibup.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_off000084f6.bin
c7e091655d53503aec2618ff06a5e24f78d636f2e5d363363e184ee859b35a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F6 5584 bytes
font_01_sfnt_off00009826.bin
c4d9e2ab1f27f21f2c74a53f79780f690e2d11a717f3c79a5aec3bb0e661f63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9826 10088 bytes

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