Malicious PDF — malware analysis report

Static analysis result for SHA-256 0310c4f53d7a07fc…

MALICIOUS

PDF

51.1 KB Created: 2020-09-01 01:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a742494f08286dfcc7bcbbdf664a8c5 SHA-1: 9b8ab52983741c5721b06cca00c7789c4a571dc9 SHA-256: 0310c4f53d7a07fceb3e8251bbb91cfda86f251c5d3c0d3a4bae62377259322b
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'Jeep cherokee reviews 2015 consumer reports' and a URL that appears to be part of a link farm, indicating a phishing or scam attempt. The ML classifier strongly 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.com/wix?keyword=jeep+cherokee+reviews+2015+consumer+reports
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/455f95_37e72e8fa3da460c8c772ec2711113c5.pdf
    • https://static.usrfiles.com/ugd/74c34a_b42e6b4bd28d42b79791b079ac092249.pdf
    • https://static.usrfiles.com/ugd/b8c837_467f2dc5953d4a34aabb7284f47b995b.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/39502719639.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/77872473331.pdf
    • https://static.usrfiles.com/ugd/50de67_d3e8f809332d4c64b77fc7d24676d429.pdf
    • https://static.usrfiles.com/ugd/b8c837_910ca1f853d14bbd9914e32619b9fbc3.pdf
    • https://static.usrfiles.com/ugd/bae363_f74a1e89251844638a5bf5df2912e7ff.pdf
    • https://static.usrfiles.com/ugd/74a852_66fceb59c3a842cbb533b89bd4853335.pdf
    • https://cdn.shopify.com/s/files/1/0465/2938/0510/files/ismart_shankar_movie_dialogues_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/40985014818.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/bofelinid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/guluxukidokalumu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b4b.bin
455e3cd6350f6457fa2d9dfdd4b15f84f253d308672425eb3448939919c50a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4B 5468 bytes
font_01_sfnt_off00008dd7.bin
c8434ba69631b90d87623d27aefdd66d4fb1354dc073eaff79a9442cbc5a74a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD7 10260 bytes
font_02_sfnt_off0000b0f6.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F6 4324 bytes

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