Malicious PDF — malware analysis report

Static analysis result for SHA-256 134d5baae2892c1e…

MALICIOUS

PDF

56.8 KB Created: 2020-08-30 21:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9368b1a208aecaf97a92b4533833702 SHA-1: 69e1fa1ac6420ad43623643fe2c60087d19da411 SHA-256: 134d5baae2892c1e66726554c5bc9881685961ae848396d29c0eceb31542bc5d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, with one identified as a redirector to a malicious domain. The document body, though heavily obfuscated, contains text related to 'Autoinductancia e inductores' and a URL that aligns with the heuristic findings. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=autoinductancia+e+inductores
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/d54300_8f11c9064f004a979a67b3a7c873c267.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8813a76683e41758b0793fc6c1a0021.pdf
    • https://static.usrfiles.com/ugd/12f4eb_c8e8ffee50c14f179297067849cf540d.pdf
    • https://static.usrfiles.com/ugd/2e79a6_49e966e057724878b58a0fa7bd2c42e6.pdf
    • https://static.usrfiles.com/ugd/fbccce_9624bd7f0132427faf5d25eeba71e986.pdf
    • https://static.usrfiles.com/ugd/b8c837_a77fcee47bbc407a82ad57eb7e063926.pdf
    • https://static.usrfiles.com/ugd/b8c837_66e04090aa0b4d32b50ab3a6a798f051.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/76143768634.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/56878951437.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/remaroriweredox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15074065918.pdf
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/52386115846.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007282.bin
93e6f8a8c0f99a4cff50f7c1ff1d69a40e1eb3b58cd02ba0a86c9c4f2d31095c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7282 4772 bytes
font_01_sfnt_off000082ba.bin
bf0990e9d22a1caef835e76980c4a4613859d45508ddc19f12f84ad99c7e83f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BA 15152 bytes
font_02_sfnt_off0000b249.bin
9206cd631bee01bd8e9a0ad8503229f4e111b0a550ff6bb3fd00c7e87f31ebc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB249 16332 bytes
font_03_sfnt_off0000c836.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC836 4324 bytes

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