Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b0ce48a5996999…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 07:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7374c8c8ecf7f1122b455a6cf6080c55 SHA-1: f2a33d847d1db36236205cee662dacd27bbf5ea2 SHA-256: 69b0ce48a59969997c89309025811b0aae0a74a7d2b763e9c57121f794333623
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/wb?keyword=trujillo%20mapa%20pdf%20extremadura'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise its malicious nature. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/wb?keyword=trujillo%20mapa%20pdf%20extremadura
    • http://files.rogerhorowitz.com/uploads/1/3/1/1/131164174/lonuzoliwavajusew.pdf
    • http://satukuf.judithviskerart.com/uploads/1/3/2/8/132816202/3616469.pdf
    • http://files.akalasjewelry.com/uploads/1/3/1/1/131164567/cefb1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/86423536898.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/dozigivunukimowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/39591713500.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/judakurujobexujotizizewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/anatomy_of_human_body_systems.pdf
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/wisojuzipojapif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/volajita.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/72865140704.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/15637317515.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/27085064708.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/71671710950.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/18408398158.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_off00006e27.bin
df502b32bdd305d33e1c0becbd916e870cb577f146a1271aceb895a511e12714
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5100 bytes
font_01_sfnt_off00007f77.bin
e927cb363829b16a3693423a7212dbb423f585e8f73b6373f5062ea8f0e047f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F77 11132 bytes