Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb96f488ed70c03…

MALICIOUS

PDF

46.3 KB Created: 2020-08-21 11:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d42f8b841473a0bf2ce334718e8723c9 SHA-1: 3c01b448c55f0628c2cfc6dde992706f7a5e0a6f SHA-256: 1cb96f488ed70c03ac04a56a91e28d19e2114714e3ea0db6f24c98c6f75a4d52
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm. One of these links points to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the URL to the malicious redirector and other URLs hosted on cdn.shopify.com, suggesting a lure to download or visit potentially harmful sites.

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/pify?keyword=vidmate+apk+pro+full
    • http://files.regalpropertymgmt.com/uploads/1/3/1/8/131856134/4744554.pdf
    • http://tedew.stevemager.com/uploads/1/3/1/8/131856330/236956ae.pdf
    • http://nemata.samollynnangoras.com/uploads/1/3/1/8/131871721/mewabagadaj.pdf
    • http://jumagen.tracytruesdale.org/uploads/1/3/0/8/130874359/vawezezuk.pdf
    • http://tutewivu.armchairacademia.org/uploads/1/3/1/3/131398017/2828202.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/sejiwopizabasopavibo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/informez_vous_orthographe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4443/files/mozuvadodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/telecharger_je_me_debrouille_en_anglais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/inside_the_actors_studio_robin_williams.pdf
    • https://cdn.shopify.com/s/files/1/0447/4558/8887/files/the_beowulf_poet.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/68994881475.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/95125835458.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d03.bin
c78ec23e7137a8e48e8628ffc9549ce68c09f5a23c5582e1b243521d161e901f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D03 5040 bytes
font_01_sfnt_off00006e19.bin
6d64c8d831d223e3ab25dff0f844c1691f978b4a1bcd6d2fc289715e8f18a660
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E19 10164 bytes
font_02_sfnt_off00009127.bin
c90bba6ba3c2f32509ea424a8ada236ffab927b802a03ef29878418013d46e52
pdf-font-stream PDF embedded font (sfnt) at offset 0x9127 17804 bytes