Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05e64d7fd3f2c4e…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 10:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2cf4795836c2797562555789f9945f SHA-1: 948ef38275d427fa8cbd93ee2efcdc3a5de236f8 SHA-256: a05e64d7fd3f2c4eeb5f58a98aad64ef79c40bee88d42acc962f3bed920e41e1
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a domain identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirection. This suggests a phishing or malware distribution attempt where the user is enticed to click on links that lead to malicious infrastructure.

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.ru/wix?keyword=la+vie+devant+soi+pdf+gratuit
    • https://static.usrfiles.com/ugd/b8c837_ae1002feafd14e38a9b8b3d76a79c158.pdf
    • https://static.usrfiles.com/ugd/89064d_7392a96a24744ac5b17835f9b5ae1137.pdf
    • https://static.usrfiles.com/ugd/b8c837_9878380b4589458a9e397987f4a737ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_efefcd1dc6be4d60a5485c2ced8d6de7.pdf
    • https://static.usrfiles.com/ugd/067ecb_44f262635d09491395736bbb18318316.pdf
    • https://static.usrfiles.com/ugd/5af86b_0a8a95752a4f492b860d551cb2297335.pdf
    • https://static.usrfiles.com/ugd/451461_54601179a84348ac917c281f3cc444bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d7425bf95024aba844d450280d229c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ca6f42af8504f15a09752679f7346c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c7878d63dee4cfcab60368b6ee8049e.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_58cbaad625944f17a493cf47771b702b.pdf
    • https://static.usrfiles.com/ugd/2e16aa_04437cf45c2542c4a0d60567037e524a.pdf
    • https://cdn.shopify.com/s/files/1/0451/1848/8741/files/software_requirement_specification_for_online_banking_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/xovopamikovaga.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/30701618303.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/5810220803.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f7c.bin
7cecd705f79bb8b182cd42d2bfc589b1ce7a0146ed5a74a782b6fc78e1fdac78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7C 5060 bytes
font_01_sfnt_off000060cc.bin
1aa0e4455b7983d375342eaa61dabfcd82f9e8997a1c2c1922f2c8e56b501b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60CC 11432 bytes
font_02_sfnt_off00008526.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8526 4324 bytes

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