Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe27643748f22262…

MALICIOUS

PDF

48.0 KB Created: 2020-09-01 20:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf86e6a311405b72806f8d7254fd0138 SHA-1: 693590282392f814e0cdca2ad179f9cd02fc45e6 SHA-256: fe27643748f22262014ae15f56d74df99d8be13cf5641fa881f920a699133f28
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at `ttraff.com`. The ML classifier also flagged this PDF with high confidence. The presence of a link farm suggests an attempt to distribute malicious content or phish users by directing them to potentially harmful websites.

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=backgrounds+5e+pdf
    • https://cdn.shopify.com/s/files/1/0456/5142/7495/files/pokemon_showdown_battle_simulator.pdf
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/airship_openstack.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8766/files/53337286054.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/l_attrape_coeur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/16429181203.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/5044336619.pdf
    • https://cdn.shopify.com/s/files/1/0441/1303/5416/files/xujedunefubivufokilavum.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/duchess_of_malfi_as_a_revenge_tragedy.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/achilles_tendon_strengthening.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bca224766f845e48bcc069e9e2cb146.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_0c5251b21dec4a68bc77cd91e6502c0a.pdf
    • https://static.usrfiles.com/ugd/913720_3aa754efa5944281bcecc36149bcf006.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e5b.bin
75a66dbe867fa41007dfa7fc5f495653999bd32b1390def81bb3c246862723ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5B 5528 bytes
font_01_sfnt_off00009142.bin
b80c5bffa647698dada0b451abfc8d17f4e0a02d6a4049eb8c636d36c84249b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9142 10084 bytes