Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f3f01f8fc22e81…

MALICIOUS

PDF

45.6 KB Created: 2020-08-11 23:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 983f96204a901e7e895d1dd53f10ac0f SHA-1: 76aa332dc60f06ffa9b7d30d3e5c2ea5078f2d03 SHA-256: f0f3f01f8fc22e81af80b85c5ea0e0a590ee141affac4baaaa3330509fdbb50f
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/wb?keyword=convert%20pdf%20file%20into%20wordpad'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of many external links, including to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility.

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/wb?keyword=convert%20pdf%20file%20into%20wordpad
    • http://files.bhurbanhillapartments.com/uploads/1/3/2/7/132740978/2785935.pdf
    • http://files.tomgillisportraits.com/uploads/1/3/2/6/132696512/2178009.pdf
    • http://files.jtcooke.com/uploads/1/3/2/7/132740900/6b5424257f1cdb.pdf
    • http://files.lakoniaultrarunning.com/uploads/1/3/0/7/130739802/kewasotavet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/99512671320.pdf
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/stereogram_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/simebavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/retegatoso.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9177/files/ncert_books_for_class_5_evs.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/68701410174.pdf
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/58942586213.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/brahmin_caste_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/weather_underground_lincoln_city_oregon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/warhammer_40k_codex_space_marines_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/medical_biochemistry_and_molecular_biology.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/wesurepebaxunigaji.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/bumevazapituvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/xipawexi.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/
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/bumevazapituvi

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060bc.bin
8cb3d505dd526e5ebd16a69536d2be217ee4ae3fc57b27c885cd648ac97489ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 4912 bytes
font_01_sfnt_off00007197.bin
4d0a50cae83cfe62375ee9705560c755cdf1d2e05fdeb3f751add59e88195a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7197 10080 bytes
font_02_sfnt_off00009457.bin
0aba5c881c93ee4949f91d0ee0a4b83bcdba254ca43a0a0995787a457b61a3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9457 16076 bytes

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