Malicious PDF — malware analysis report

Static analysis result for SHA-256 061fa2421db90daf…

MALICIOUS

PDF

57.5 KB Created: 2020-08-30 11:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26067bbf9e9d313cd51fab568542d5a7 SHA-1: 610a4df0db5c8b66eea7ce804881115d1827b2de SHA-256: 061fa2421db90daf3b4cdf07458cf88a9bfd34409c3297af2fe0243d941f253e
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which is identified as a malicious redirector. The document body, though partially corrupted, includes text related to 'Canterbury Tales' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a link farm strategy. The ML classifier also flagged this PDF as malicious.

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.me/wix?keyword=canterbury+hikayeleri+%25C3%25B6zet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/lavigadidoxow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7710/7865/files/pesquisa_bibliografica_em.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/99057031978.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd7b245c3f97477db917eeb81f262350.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_e37a27550c8d4c979e2757b55d6e3f9d.pdf
    • https://static.usrfiles.com/ugd/e02969_3801bf9fdeb449b9a1d7c381da441971.pdf
    • https://static.usrfiles.com/ugd/b7306e_11ccbdcf72bc4959bd5d6a54cba16f7c.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_0f7597f760994dbbb9cee37de3106eda.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/fudegizofobopewilow.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/kifemukesogodozemibakafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1247/files/23288877705.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/63736073666.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_off00007d08.bin
77e88033d6782a9926fdedd4e17ef1e2068462e2fc5442542cb7a95a1d57beed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D08 4884 bytes
font_01_sfnt_off00008da4.bin
393ec97b990ac342829b33220777a2657ee266b2eecf7ff6da2863c0940d5690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA4 12324 bytes
font_02_sfnt_off0000b3c2.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C2 16204 bytes
font_03_sfnt_off0000c8f0.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F0 4324 bytes

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