Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bef86ec4dfed12…

MALICIOUS

PDF

44.0 KB Created: 2020-08-15 03:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5313eed28171715fa40e85b0a698cb3b SHA-1: 330d1d129b9cf9064a973314f429a1d1e0ea835f SHA-256: 49bef86ec4dfed1290bf2d8b949be6fb14cc7535aae43d73f97c116827417bbc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is presented to the user as a download for 'Msi afterburner free windows 10'. This indicates a social engineering tactic to drive traffic to malicious sites. No scripts were extracted, and the document body is heavily obfuscated.

Heuristics 3

  • 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.
  • 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=msi+afterburner++free+windows+10
    • http://files.smalltalktherapy.co.nz/uploads/1/3/0/9/130969693/senipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/batolagidebajezogeluduke.pdf
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/74176491167.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/22272725124.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7574/files/4915520031.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/texuzapigifakolek.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/48352574992.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/96309719945.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/23767494433.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/titogufenatitimibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/durapifu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/dopiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/53478677183.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/69567917577.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000603d.bin
34719114001998ebe6f7d60b181cd6acccf77c8eafe2914873a136d0c575d486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 5184 bytes
font_01_sfnt_off000071f7.bin
a3a8a4ad88d67fc3d5967a7bb187e0bf698107136f386a69c237f9d302295bea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F7 10276 bytes
font_02_sfnt_off00009500.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9500 4324 bytes

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