Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1857ff17f99412…

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 12:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa8c242cf05bdd8b2b19b224f73d65a7 SHA-1: 1f236080d28dd698e98453b1ba72d38e98216684 SHA-256: 3e1857ff17f99412b44e1975ff09538e45aa962c7fa7329a7cfd66b0b9f76572
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a product manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to Shopify, likely to obscure the malicious destination. No scripts were extracted from this sample.

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=lenoxx+cx+908+manual
    • https://cdn.shopify.com/s/files/1/0432/2030/4034/files/joining_letters_handwriting_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/43970216761.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7805/files/netflix_for_android_5._1_1_apk.pdf
    • https://static.usrfiles.com/ugd/b8c837_edf86a024e1b415380a37e15fdbf7d61.pdf
    • https://static.usrfiles.com/ugd/93c935_3e7b40c29b464cb888d7f0c71d2cb4b4.pdf
    • https://static.usrfiles.com/ugd/5ecadc_b9d785ec0b8b47c985cc5b0f36841675.pdf
    • https://static.usrfiles.com/ugd/b8c837_26cf96e6c3ec4c6eb88ab66abe21ef4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd3d2001f3f4b24a3b17dcfecd18bb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb6949bb024f4b61a7ae4258735e01ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_8470ae7d1d0b452a93a2c3e5dfdec204.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ab1b82ed94e4ee587a8b5fe8d80a4df.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/makagogotibizisosipobemum.pdf
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/eminem_lyrics_lose_yourself.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/tekizodilosilekumovonetup.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_off00005e92.bin
7f2c3ff38ba5b5dee84b9ab920ea24a48e1c852a013ad2acccbc6fec101c2618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E92 5172 bytes
font_01_sfnt_off00007022.bin
a9fe2da4ac9f61281dcdb2f251fd05f4314c69584684ba6bd3b91b9a349e4ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 10176 bytes

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