Malicious PDF — malware analysis report

Static analysis result for SHA-256 364858aae07a5704…

MALICIOUS

PDF

43.6 KB Created: 2020-08-07 15:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682b3179b7b4a8c11365421f4874e3db SHA-1: c6feab2de3efd81a62f6e21ba29ee9c0eb00c824 SHA-256: 364858aae07a5704a1a5abc1bf586586ce1674a8845ae28ccea2a18a8343b4a1
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 external PDF files hosted on various domains, including Shopify. The primary malicious link, 'https://ttraff.ru/pify?keyword=agni+siragugal+english+book+pdf', is identified as a malicious redirector. This suggests a link farm or SEO poisoning attack designed to lure users to malicious content by disguising it as search results for books.

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=agni+siragugal+english+book+pdf
    • http://files.cottagerowgallerydc.com/uploads/1/3/1/4/131453241/lujele.pdf
    • http://files.frankracing.com/uploads/1/3/1/3/131383743/ed0cb6cbf.pdf
    • http://files.simongray.co.nz/uploads/1/3/1/4/131454523/180137.pdf
    • http://files.sustainableartschool.org/uploads/1/3/1/0/131070485/2332046.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/gopubedoxusabikewewalugib.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/factoring_quadratic_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/83684909910.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/78408092492.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/automate_the_boring_stuff_with_python_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/les_animaux_fantastiques_livre.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/babiwuzikutegirisipeke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/xejudovav.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/doraxofafal.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/jinuwimazuvafagew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/19516803519.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_off00006b97.bin
d9fc87da85e79529f3cd5fa518a24565dddd149f2e79834f8ad63cd2ef50ab47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B97 5496 bytes
font_01_sfnt_off00007e3c.bin
dbc2c634928a5e2387ce12bace1f1e85110db50723b8eea6e7f30706847dcdf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 9876 bytes

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