Malicious PDF — malware analysis report

Static analysis result for SHA-256 0623e82445422981…

MALICIOUS

PDF

40.2 KB Created: 2020-09-17 06:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d69c66ee0570329034e9e7c937bb75a SHA-1: 2be849fac2c29c6a50306540176161734ffb76ad SHA-256: 0623e824454229815899cbe06897fa2bb859b5814b10ace6096335ee0829309a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector and others forming a link farm. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially for phishing or SEO abuse.

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.me/wix?keyword=coastal+plains+animals+names
    • http://nozaxedig.zerowastelady.com/uploads/1/3/1/3/131384013/2832986.pdf
    • http://tedegere.lincolnstation.org/uploads/1/3/0/8/130814338/lanazasonemabop.pdf
    • http://xerater.intlbob.com/uploads/1/3/2/8/132814930/wijedirulunekili.pdf
    • http://files.cayliemashphotography.com/uploads/1/3/1/6/131637679/jobuf_voratajoso_xenofovabuga_veretube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1a6ff9fd-cb09-46e0-a802-29522d1d7065.filesusr.com/ugd/1715bf_138b1546211c4e5c85ee0ea752a1c018.pdf?index=true
    • https://e968657f-4f7b-43f7-9fd0-4f8081cbba5e.filesusr.com/ugd/aef5b7_bd968d92d1cd4f81b2d0295f612b3289.pdf?index=true
    • https://4fe8f670-e182-4e32-b4f5-3ace43b74a54.filesusr.com/ugd/891219_ecb9c4e6473446d89ce632c4392ade07.pdf?index=true
    • https://d7de7948-80f1-467a-973f-9067f7078848.filesusr.com/ugd/2f3216_4a92990acb22449b8392a2693942620e.pdf?index=true
    • https://1137ba9d-dee1-438e-88a5-abf2c4cc5857.filesusr.com/ugd/c268f7_60d1831171324c7a987dccfec93b2ea4.pdf?index=true
    • https://2bacce46-ed52-4dc6-8962-e38e47796b77.filesusr.com/ugd/bcfc12_29b0ddbdf0264a098f48d5e4ceb0e317.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0459/5443/3183/files/calculus_for_dummies_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/63195168927.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/puxiju.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_off00006090.bin
a2af610baae86672f0a83b2cb2b7d44dbdff0e85000e8f8b4dcb91d160966868		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 4776 bytes
font_01_sfnt_off000070b3.bin
d028974f8ad9e920599b959799534c44b83946138aa77516950437938acab0c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 10388 bytes

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