Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c52ea5f4be46369…

MALICIOUS

PDF

44.9 KB Created: 2020-08-17 03:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a7cb650b97a7ae6c28daf2d11e2673d SHA-1: 5313fa3beb495c9df9c9c7aaa814619e20fb584c SHA-256: 0c52ea5f4be46369c849dcbd2b68caa4843e7d5ea0636eeeb9e0e8ca3ad51025
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.ru/pify?keyword=cheat+brothers+in+arms+3+mod+apk', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to malicious infrastructure under the guise of providing game cheats. The ML classifier strongly supports the malicious verdict.

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=cheat+brothers+in+arms+3+mod+apk
    • http://lipugakaw.statecollegefh.com/uploads/1/3/0/8/130814423/7222903.pdf
    • http://files.militaryresponsetojonestown.com/uploads/1/3/1/8/131857650/tuzafor_votinijuz_nakexitajazatig.pdf
    • http://files.onestopcustomshop.com/uploads/1/3/1/6/131636692/merebu.pdf
    • http://zegijavuf.bullbearkidsbooks.com/uploads/1/3/0/7/130739430/sarajozixetuf.pdf
    • http://files.russglen.com/uploads/1/3/1/3/131380728/3628846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/biodiversity_loss_causes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/11156796087.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/lokujemisawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/scrum_values.pdf
    • https://cdn.shopify.com/s/files/1/0431/1046/5698/files/vamokofokibijijujofujidex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/fanenobilojuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/tejapegilezile.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/jagumubunomozulaxupipibom.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/sapevakujufidajorano.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2918/files/99191126858.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/48373472304.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/kavanibexadabajot.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/how_to_prove_a_function_is_injective_and_surjective.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/kiwitaxorasawafabolu.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_off00006c34.bin
f44431d20950434eb456819bc8aff978303c3b0da05dd764a6255d3340a3c925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 5440 bytes
font_01_sfnt_off00007e7c.bin
29aabbb8a4786b205792451657ae0ab3150b517d97f1af72e1a5e0d0ec86ad16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7C 12856 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.