Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a1b082b1d421de…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 01:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4648b76504e5838bfdbb1baf5f3c9e0 SHA-1: ef3f7f331b7ed5dff9435243bb2d38d502bcdec0 SHA-256: 88a1b082b1d421de7901a268d4ba2718382577c714ae0f443e046c5aaa594bef
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to malicious infrastructure, likely as part of a phishing or scam campaign. The document body and embedded links suggest a lure to download content, potentially leading to further malware. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm used to obscure the malicious redirector.

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.ru/wix?keyword=download+vampire+diaries+season+1+sub+indo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/desasoranu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/wedumurudusatekejoxaxula.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/82954085516.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/bible_study_tools_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/dexoturen.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5770c939a3345329611b70808e26100.pdf
    • https://static.usrfiles.com/ugd/b8c837_7caae7fb7eea4064ac077435fc87f62d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/bajenotorab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/92317707083.pdf
    • https://cdn.shopify.com/s/files/1/0436/0388/6238/files/polyembryony_in_mango.pdf
    • https://cdn.shopify.com/s/files/1/0430/6334/5301/files/discord_mute_hotkey.pdf
    • https://static.usrfiles.com/ugd/b8c837_057856fd00cf46b0805d026f0c1eec67.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2cb3a4d89764a438a4b9782b91d9e0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_695ba211d7f043d898ec67f7cbd7a68f.pdf
    • https://static.usrfiles.com/ugd/b8c837_27a585d233e94e27a2dc28e0bd69e478.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_off00005ab6.bin
94c59163b68518d1037a72f33758cd83445506ae237749663cf1bc0329d34850
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 5448 bytes
font_01_sfnt_off00006d3b.bin
624f57d88b2cf4662084a392b8fe1ae6451578c12523853998b98d8699ab21ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3B 10248 bytes