Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2d53025543d924…

MALICIOUS

PDF

45.1 KB Created: 2020-08-31 22:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8703dbdce5eb106c59c56572fb85d6c7 SHA-1: 697b1a0bd9e0d95df996ed50c8cd2660dfd28f4a SHA-256: 5e2d53025543d92478e5f7f0a3107f98bb7c6294221fda25099b359275a8057c
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting the actual payload.

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.cc/wix?keyword=arrancame+la+vida+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/hobby_electronics_projects.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/earthquake_drill_narrative_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/tmux_split_vertical.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/gakadufoton.pdf
    • https://cdn.shopify.com/s/files/1/0434/3336/1574/files/capital_one_mission_statement.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/nijumuvubexavovi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/wowepex.pdf
    • https://static.usrfiles.com/ugd/8acad3_d8d7842258d34391afdd277a555c668c.pdf
    • https://static.usrfiles.com/ugd/03ae60_6e09b68cddb44f269c6a2783a057e194.pdf
    • https://static.usrfiles.com/ugd/f09a9d_1d4a721bcf0849c49a7d6c19fd5d19d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ac644d0e1a149d2abea4b0a4a9dd6de.pdf
    • https://static.usrfiles.com/ugd/f1780b_cf5b49e01abd435eb27bf1bb0bab61a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7337b047cace4f24a068a8c5ea9ac969.pdf
    • https://static.usrfiles.com/ugd/ef253e_45575583834346fe8b0803bf5f0f15e4.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_off00006fa0.bin
bdb0fc7f045c9d7e38314728c8c5974367f7e900b191e3c254a0fbef3ca2e72b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA0 5172 bytes
font_01_sfnt_off0000812c.bin
13b7e10e3f867d230ebc82a079f6d66c89517fdf695778b0ffbf196c149e2aa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x812C 11320 bytes