Malicious PDF — malware analysis report

Static analysis result for SHA-256 76cebea03223a925…

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 23:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2af4c80695b62f9209d4a6989c78f170 SHA-1: 29b1c5e871c627a77ccb483dc3a69fdc135c9cac SHA-256: 76cebea03223a9254231078d8662d7956ff2c3bdebf466dce8d69d11e33987b1
154 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=chiranjeevi+songs+video+songs+free, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=chiranjeevi+songs+video+songs+free
    • http://gisir.childrenscoalition.org/uploads/1/3/1/3/131384401/1651605.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/tiragegixigavuvukovubez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/62166448214.pdf
    • https://cdn.shopify.com/s/files/1/0449/7919/1966/files/jowapiwek.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/37669248175.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/lowizosavuwor.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/86260927700.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/64154514213.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/biology_book_10th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/10030116762.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_off00006511.bin
f4892341105159809d02eac8240e84056666e4bbbfebec0e01e98e5b8a7dc421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6511 5180 bytes
font_01_sfnt_off000076b5.bin
473e0834551e8bfc5b0c7cf3409d129656187a8d58fe9fd148d2abc916ce3ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B5 11704 bytes

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