Malicious PDF — malware analysis report

Static analysis result for SHA-256 824243f56d694c35…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 15:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aae7f5eed32ff1878e68199064aa7555 SHA-1: 7fc98fce32f5e2478073510920b6fc4b950384d0 SHA-256: 824243f56d694c35ae3d56342c1881aab902e4046f8a5322fe13acf33f8cab5a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm or SEO manipulation scheme designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=presentation+of+data+and+information+of+money
    • http://files.projectnohunger.org/uploads/1/3/1/4/131483097/ce8fddba5da63.pdf
    • http://files.mealsformedicine.com/uploads/1/3/0/8/130874026/9018e98aba1.pdf
    • http://pirimanir.tlccoffeehouse.com/uploads/1/3/2/7/132740214/4986099.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/agency_problem_in_corporate_governance.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/tanka_poetry_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/75651019434.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1383/files/fuzanowosefenivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/14554144927.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/science_books_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/bimanual_palpation_of_bladder.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/kevubujegozasovibujixaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/30998350951.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_off00005ec4.bin
78bcee22d7729a2cab1805a2b7d5025ee3df733c1290720ab4ac903c8fd855c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC4 5124 bytes
font_01_sfnt_off00007015.bin
10586df4346e3e3dfcb8b303444820793a80f36b9055d74aaf9403f422a43255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7015 10116 bytes

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