Malicious PDF — malware analysis report

Static analysis result for SHA-256 069a7279408a8a79…

MALICIOUS

PDF

50.9 KB Created: 2020-09-01 03:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7fd998e0d49700fc893e7592a6062ac SHA-1: 20ee59fb2743cb171e98f4e57d9bcbc6734b715a SHA-256: 069a7279408a8a79976587816aeb137747a00dc1a9788ecd7495028f8304d6ea
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.com/wix?keyword=atmega16+datasheet+tieng+viet' is the primary IOC, likely serving as a lure or a redirector to a malicious payload.

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=atmega16+datasheet+tieng+viet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/86035265210.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/lefisinifidazamodibelewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/zuwixoji.pdf
    • https://cdn.shopify.com/s/files/1/0435/6525/2769/files/nivapuba.pdf
    • https://static.usrfiles.com/ugd/2c608b_2e6734e4f4ec4d88a669ee4f2eaea401.pdf
    • https://static.usrfiles.com/ugd/e643da_660c9bd8e03a47e2a61967064e39cdc0.pdf
    • https://static.usrfiles.com/ugd/ab059d_fc618e63a331482cac7e04681d920685.pdf
    • https://static.usrfiles.com/ugd/74c34a_bc6ff1d4bba14c43a78b48fc726ceb11.pdf
    • https://static.usrfiles.com/ugd/b9801a_a0243c3b6a4f4eb1b1b244a8137351ea.pdf
    • https://static.usrfiles.com/ugd/8d57bd_44f2561ff7c84076a17ec4635c40338a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0252aac7b25f41178d4ae09497bf6393.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_off0000899d.bin
7f834fefd5473047b54b858298010e698e5304c492f8f57d0229be0f63644ea7
pdf-font-stream PDF embedded font (sfnt) at offset 0x899D 5364 bytes
font_01_sfnt_off00009bc9.bin
0b8ecb46c3b27064e2949ae31bee6e0e621d097d63add46149b5d3a985a18589
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC9 10272 bytes