Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bef5001e4630f0…

MALICIOUS

PDF

50.5 KB Created: 2020-08-25 21:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41a2230d8b2e3e5eb5fabce01954b5d9 SHA-1: e4a0a09489246717ec8f71d3ad37425e05fa91c8 SHA-256: 83bef5001e4630f08be69afc2851d706337cc4641bb391daf68e6e1cab9f4b9a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=geometric+dimensioning+and+tolerancing+symbols, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=geometric+dimensioning+and+tolerancing+symbols
    • http://files.gethilineinsurance.com/uploads/1/3/1/6/131607269/8187401.pdf
    • http://files.vcinfocus.com/uploads/1/3/1/4/131437799/3549394.pdf
    • http://files.atolsu.com/uploads/1/3/0/9/130969831/pelusuw.pdf
    • http://vused.thepowerofpainting.com/uploads/1/3/1/8/131856326/luxofiboxeri-lurupaf.pdf
    • https://cdn.shopify.com/s/files/1/0459/2553/1815/files/cccam_emulator_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/autoecologia_y_sinecologia_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/abide_with_me_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/77639488757.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/41156821594.pdf
    • https://cdn.shopify.com/s/files/1/0437/0055/1845/files/foturogokowuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9179/5873/files/39510545142.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/fujafifoxavir.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/94819658964.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086e9.bin
0faa73b4d467befe59263bec725790c4bac676877efa12060ac3ea69c17918c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E9 5532 bytes
font_01_sfnt_off000099a8.bin
cae737bd1cd9d29313818830378bccac2bad34ba0d21aa590bd35ca2464f617f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A8 10508 bytes

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