Malicious PDF — malware analysis report

Static analysis result for SHA-256 740858e2836e83f2…

MALICIOUS

PDF

39.0 KB Created: 2020-08-10 11:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828b21371876c91b0040ce0092450ad4 SHA-1: 1d0d211481fda633e00fd2ba8199fb9ad0d198f2 SHA-256: 740858e2836e83f25b702f68adb876b1e4dd755b4754cfdb8ef74521a6ea07b5
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 pointing to Shopify domains hosting other PDFs, and a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains the redirector URL. This suggests a link farm or SEO poisoning tactic to distribute malicious content, likely leading to a phishing page or malware download.

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/pify?keyword=canon+700d+specifications+pdf
    • http://files.amazinggrasslawncare.net/uploads/1/3/0/9/130969065/1965391.pdf
    • http://files.cullensailworks.com/uploads/1/3/2/6/132695432/ruzudo.pdf
    • http://files.harvardseducation.com.au/uploads/1/3/1/3/131379099/3910949.pdf
    • http://files.pittcorelab.com/uploads/1/3/0/7/130739786/9bb2cbfd.pdf
    • http://files.acrossthebridgeinc.com/uploads/1/3/1/3/131379312/zidel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/ng_feeding_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/6878193437.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/faux_amis_anglais_francais.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/jedezufita.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/xutugavokezoworaselepa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/assembler_des_avec_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/wewuwadoxuvutit.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/lightning_frequency_arrester.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/lofosovekazumoxowet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/todiruwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.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_off00005964.bin
f67ebce9e6fa44cefe9aa62245be7462a00e643cdc78d7600faea7d29cdbadc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5964 5148 bytes
font_01_sfnt_off00006b00.bin
fa7a8eb063bd7bd0162f0688565225729f614408d33ea93c5b009ae7a8fbc4ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 10500 bytes

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