Malicious PDF — malware analysis report

Static analysis result for SHA-256 8776e2751d152633…

MALICIOUS

PDF

53.4 KB Created: 2020-08-31 11:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cab8fa03e4c9d5ecfc9af2f34176791 SHA-1: 8f4ea369f53c0a09b80281c118daf8a22ac7f930 SHA-256: 8776e2751d152633fca510510c5399faea5277126af64e374e903f0a06de394c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a guide, and the presence of a password-protected archive lure indicates an attempt to conceal a payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=divinity+original+sin+guide+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_ce0eb75b390749449b9ce8ebc3cee67d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b17ce93c91c3442898b4e0ee7fd53639.pdf
    • https://static.usrfiles.com/ugd/1e4819_20acdb1c1dc645468234418e8fcae9f3.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_7887fe6460094ff7a0e02db46a15f437.pdf
    • https://static.usrfiles.com/ugd/b8c837_20bf0c9171154a18bdc394bd83543d88.pdf
    • https://static.usrfiles.com/ugd/353d00_78f2705a7a7941e38b484577cd143ba1.pdf
    • https://static.usrfiles.com/ugd/b8c837_022441e0a6994c79b7f1fd4cfe042bb1.pdf
    • https://static.usrfiles.com/ugd/83e24f_361f811af74c4777b2cd652d921a8243.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/22272725124.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/97951752237.pdf
    • https://cdn.shopify.com/s/files/1/0437/3043/6247/files/86365838973.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3504/files/bose_soundlink_colour_manual.pdf
    • https://cdn.shopify.com/s/files/1/0466/6638/3525/files/business_communication_essentials_7th_edition_free.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_off00009375.bin
efb82cd6afa13de524e6ed19af6912750fa119ecf9c0ba5801b46c411465b8f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9375 5372 bytes
font_01_sfnt_off0000a5d8.bin
e43a28c30c5136839a962c8d140bafc2bd13d674f0509716021f04641b23e4fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D8 10376 bytes