Malicious PDF — malware analysis report

Static analysis result for SHA-256 6977003be805d366…

MALICIOUS

PDF

77.3 KB Created: 2020-09-06 11:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5270b35855e06bbd65f356de68337ca9 SHA-1: ad6ddf8a688a33b696b9586aad7ee241f1ab6e1b SHA-256: 6977003be805d36601df8bfd2cbddcbab4d8a8afed4025abddeb9f9d1a719d18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or malware distribution.

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.club/wix?keyword=cyanogenmod+7.+1+0+alpha+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9934/0448/files/83222716142.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/lijizamilalej.pdf
    • https://cdn.shopify.com/s/files/1/0429/0736/9639/files/liwuneb.pdf
    • https://static.usrfiles.com/ugd/c33f71_9c197c6ad72e47828757c11328fb1d9c.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/rexilokubafiwoforebiwefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/33867639416.pdf
    • https://static.usrfiles.com/ugd/930050_0aaa44f824cd4a759a7f75d0ac5fca3f.pdf
    • https://static.usrfiles.com/ugd/02beb7_24d093cd62c94df08f4aca0fd3227353.pdf
    • https://static.usrfiles.com/ugd/c0518c_89bb562d558b47eeb7e280ee186cc023.pdf
    • https://static.usrfiles.com/ugd/227d0f_6d692650ec8f491bbeabc58d0fb1f9f3.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_off0000ea3d.bin
b8552882a43b59835951349c568304b651d2ae56a9aff30c37f95fb710dd4185		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 5412 bytes
font_01_sfnt_off0000fc9c.bin
710fddb7b73224d5c465df9582bfaf4e9504cf539a1dd5202526d2e935548ec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 13408 bytes

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