Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ebe1062d44edb9…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 12:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b183e4f8e40bc7e325a14a1f4cdc950a SHA-1: 102a500bd11a67d147122d6199a6ab32ee4f1ae5 SHA-256: c7ebe1062d44edb9247fcc01475e8275959fa65bd64a57e2b86d6c1d6e1a72d1
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting an SEO poisoning or phishing attempt. The primary malicious URL identified is https://ttraff.ru/wix?keyword=starfinder+campaign+books. The document body contains garbled text but does include the malicious URL and several benign Shopify URLs.

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/wix?keyword=starfinder+campaign+books
    • https://cdn.shopify.com/s/files/1/0431/2567/0042/files/12256337596.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/libomadozevekovafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2012/3285/files/redilolananikavawoleti.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/47419197582.pdf
    • https://cdn.shopify.com/s/files/1/0440/6788/1125/files/3564232039.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/primary_spelling_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/bifiwemugikikisosufakofak.pdf
    • https://static.usrfiles.com/ugd/b8c837_a81ace8223e44e36bc80f160beee2555.pdf
    • https://static.usrfiles.com/ugd/625844_6b156449146c428196400203ba857851.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_31dc083352b94f8a9822c5778a1e9da0.pdf
    • https://static.usrfiles.com/ugd/a107db_569ece19ce624f47bbde93bde8dd5487.pdf
    • https://static.usrfiles.com/ugd/b8c837_be201753f15b44ee8d9af8c090a31eb4.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_efc6a22ce5194f7983d0999ce5e55161.pdf
    • https://static.usrfiles.com/ugd/b8c837_1351572647e1432a8131b2b08e7c330b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bddd9dbab824720ad073600196511af.pdf
    • https://static.usrfiles.com/ugd/d3758e_e21cfab80cde4b5d8425c11582b6380c.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_off00006c53.bin
b7dfe5744249315177d8a4752a3b74140d7e6d4c5418f7695bf0e6bd9d39d7b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 5748 bytes
font_01_sfnt_off00007fd1.bin
dd34217792ac1567cc757b7f6d7e732176b7683c1eae45116466728a2b21531f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD1 10600 bytes

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