Malicious PDF — malware analysis report

Static analysis result for SHA-256 8723d9b7836a8477…

MALICIOUS

PDF

44.3 KB Created: 2020-08-29 07:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77b9d4e163ff1151cf875393d09570ce SHA-1: 6bc39da91a73908e4d533ebb99c70c3bafbd0fd8 SHA-256: 8723d9b7836a8477b23889c984020094944e171fcd1c02e42b6286b2816634fb
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a book title. The presence of numerous other links to Shopify-hosted PDFs suggests a link farm or SEO poisoning attempt to increase visibility of 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.com/wix?keyword=the+secret+life+of+plants+peter+tompkins+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7413/9800/files/46569288670.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/levodakukonasumuzuzosepun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/zomilaxupaxobod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/18456917296.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e01b7c56bd34eb08c01759e7358265c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf6424b2a5d14e59af56f43835f6b197.pdf
    • https://static.usrfiles.com/ugd/b8c837_8997aafa3f27494ab9722614bebfc825.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd5307d50f8c420bb8eef6f98dc113ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_84cf620dcb064b84b6a80912177c186e.pdf
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/85796256685.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/biblia_de_jerusalen_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/5195131300.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/61961002055.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cfb949e730748e89c0092a9809fb87d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7b4058e02c947d09a2cf0f90eecc184.pdf
    • https://static.usrfiles.com/ugd/b8c837_95443c9a2d2045878d48648be14c63ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fd77c42eef24774887556e184ab81f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_900cc010e003427ea938ad855f92880b.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_off00006ca1.bin
55864f2c412bc6924ede14e4033a0e8bf52df4fadf3506102dadd984d73a67e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA1 5408 bytes
font_01_sfnt_off00007ed0.bin
faa388db311f067ca1eca24928da02199a40b1ad1119f22d7ff242d3400ead97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED0 10912 bytes

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