Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c0b45fa2efd972…

MALICIOUS

PDF

39.9 KB Created: 2020-08-29 01:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0871105084a3f7b25f51f8e27cbcb64 SHA-1: 311bd1f9b1945ae8ea5b3d7663f5ba313ddf1402 SHA-256: 08c0b45fa2efd9726683226e0502f61a19be8207e7705e0e1a5b3a844221876f
154 Risk Score

Malware Insights

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

This PDF file contains embedded links, one of which, 'https://ttraff.com/wix?keyword=field+guide+to+understanding+human+error', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'human error' and includes the malicious URL, suggesting a social engineering lure. The presence of numerous other PDF links indicates a potential link farm or SEO manipulation tactic.

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=field+guide+to+understanding+human+error
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c8177ee939264312bc87960bd83c0ff5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1afed4af97774fb89ac2cd30adfd8427.pdf
    • https://static.usrfiles.com/ugd/b8c837_a309032ba28d4d289b36c7be125dabd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_2826ded81f9641cfb74f3207228d1a8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e48e6ace5ee48cfb4859bc2255ecf25.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3521/files/52875528522.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd4b319d51fe4425b795c71f3345c35d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a68b588fcee4f509b10402ac94df59f.pdf
    • https://static.usrfiles.com/ugd/b8c837_861183074ec84b019bfb727e8f6b6c40.pdf
    • https://static.usrfiles.com/ugd/b8c837_808ed6bc52454164bcfb3ea2763fa2b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc75acbff4444436856a2d8a458f12a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f2fee6cbd634393875379cf7b6b5e53.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2225f8f139b47cc85f535f7f1e173db.pdf
    • https://static.usrfiles.com/ugd/b8c837_734f0021fc9e4a6093b275344b3cafcb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e84.bin
a97e4db5dfe13f672091882f06adc6b5322f98431237974e24ae1eb0bff10158
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 5196 bytes
font_01_sfnt_off00006ffa.bin
3f2590f1c377f00b20704e929b625d80a66774560ae9dab6b2446da0af9549ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 10168 bytes