Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89e8b083a5c5dc8…

MALICIOUS

PDF

33.5 KB Created: 2020-09-14 01:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c872670297f6186641d50c676c6c3df7 SHA-1: 462886cb672f57299ca10d5e7363aff73171b2c4 SHA-256: b89e8b083a5c5dc824a2812a22cb7599c9611e3bdd229fac2fd521e232c5834d
152 Risk Score

Malware Insights

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

This PDF document contains a high number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.club/wix?keyword=wauconda+grade+school+wauconda+il
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/12894758701.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/lajezesineragotuwazukir.pdf
    • https://cdn.shopify.com/s/files/1/0462/7942/6197/files/space_jam_theme_song_sheet_music.pdf
    • https://static.usrfiles.com/ugd/865d50_47b4e06fcdb64260916d27bfd8856512.pdf
    • https://static.usrfiles.com/ugd/20d83a_8c63f44e1552488ca5d3fbc0c87cea82.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_b008a4208e6541688d53d0a5c7da8a05.pdf
    • https://static.usrfiles.com/ugd/de65f7_6b53ee97ab6643b8864e5308730a2714.pdf
    • https://static.usrfiles.com/ugd/26f730_12769d2d0e0d417ba50265f8611d7e00.pdf
    • https://static.usrfiles.com/ugd/f241d9_3c16be6476864d2d91678d05bd2abb3a.pdf
    • https://static.usrfiles.com/ugd/3225da_7cbcf6ff3f3a49a883e20e30f87b3473.pdf
    • https://static.usrfiles.com/ugd/72ed28_9a5b92cd9b924ff3a561c6a6def55f2b.pdf
    • https://static.usrfiles.com/ugd/98e2de_1b719e82621545408821ba6873d8cc25.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/phool_chameli_ka_gana.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/google_sheets_drop_down_from_named_range.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_off0000456f.bin
2927ea5e3f6125631400fef540d64a7d86c42468de08ad1bfa42a12501b8feb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x456F 5304 bytes
font_01_sfnt_off0000578b.bin
780bc35214d7e4a3a6304d7c8f10ae4a3e657088fe8b846990258622fd398d46
pdf-font-stream PDF embedded font (sfnt) at offset 0x578B 10032 bytes