Malicious PDF — malware analysis report

Static analysis result for SHA-256 051588679a9443fc…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 12:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cc0df541d8652b82fe5da7df2804918 SHA-1: 343a50452d60ddb0750034348a7d4f249c4bd185 SHA-256: 051588679a9443fcc9560c392a44199a879f3ba8649f83211603fe568619a3f6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/wix?keyword=things+to+make+and+do+in+the+4th+dimension', is designed to lead users to potentially harmful content. The document body and embedded links suggest a tactic of creating a link farm to obscure malicious destinations.

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.cc/wix?keyword=things+to+make+and+do+in+the+4th+dimension
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/larudoremuzegoletulofobe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/ublock_origin_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/9237771773.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/vunun.pdf
    • https://static.usrfiles.com/ugd/b8c837_4258f60513eb447194c3545dff3cfab7.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/torque_pro_app_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/winotiwirodukedal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/kerr_home_canning_guide.pdf
    • https://static.usrfiles.com/ugd/e73fea_313c5f23230a47a9a89a68d71b5cefb9.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_3d3eda4da9b446f3815b1ba124cfdc56.pdf
    • https://static.usrfiles.com/ugd/6f58fb_db48ed399ad54c968eec69736149f2ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b0978d96f8c45b39f765347f84a02ea.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_off00005ef2.bin
6869739031f85702dd2d89cf08c03a94df5b5fb82a7f4be977eba52290e7a0a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF2 5212 bytes
font_01_sfnt_off00007083.bin
33ae0280e91ab9743794d770a80602991cdbb913361191b2a3e7d57341829a25
pdf-font-stream PDF embedded font (sfnt) at offset 0x7083 10328 bytes