Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6c724ac43f42b7…

MALICIOUS

PDF

41.8 KB Created: 2020-08-07 18:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc325064dec847ee70c043ae9a82bad2 SHA-1: edb170b6486eef0398db91e3d3ad7b6fa54d7d55 SHA-256: 6c6c724ac43f42b73a62f09d2540dde68e0d1233cf753fe5580fc56bc225b761
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 of which point to a link farm designed to generate SEO traffic. One of the primary links redirects to a malicious infrastructure at 'ttraff.cc', indicating a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious content, likely as part of a phishing campaign.

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.cc/pify?keyword=asian+history+quiz+questions+and+answers+pdf
    • http://files.sophiebrenneman.com/uploads/1/3/2/7/132712116/midazogeluzasob_fixif_defidoganare.pdf
    • http://files.mylocalpilates.com/uploads/1/3/0/9/130969481/f829f52ad31f733.pdf
    • http://files.rikabirdcreative.com/uploads/1/3/1/6/131606289/8545431.pdf
    • http://files.itstimefitnessaz.com/uploads/1/3/2/3/132302993/b5759645ff7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/basobataruv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5448/8990/files/uninstall_razer_synapse_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/9853837673.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/dedidoredaguxojuxidis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/farozonunararopejufenadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/numonerubikulexajanitemol.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/89681450098.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/32948982006.pdf
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/abraham_twerski_kitaplar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/60449368733.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_off000064e4.bin
dbfffd673766ef546eee837ddd5b0cb726061017c6cfaea71cc03695b1144538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 5456 bytes
font_01_sfnt_off00007790.bin
86558f100de1aaeee92d503d1e67714a59099ff119c8ed28e2a50ed9a294ee52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7790 10128 bytes

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