Malicious PDF — malware analysis report

Static analysis result for SHA-256 6727e7d180ed914e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-08 07:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c78753f58c52abe0ce9a0bae427f00 SHA-1: 79f5274ed0cebffa6a6731e6e6cf54da70d8c9f1 SHA-256: 6727e7d180ed914ef8cbbe3d9a03c0d5a46af13fdf6e302d99f8038d11479371
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to drive traffic to malicious sites, potentially for phishing or malware delivery.

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=canard+pc+hardware+40+pdf
    • http://bomuvu.carolstatella.com/uploads/1/3/0/7/130775257/01ebd4922850.pdf
    • http://files.ukboerboelclub.co.uk/uploads/1/3/0/9/130969297/nisug.pdf
    • http://files.turkeycreekretrievers.com/uploads/1/3/0/7/130740124/458cba04de1f8c.pdf
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/58750705429.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/38848637936.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/zuwujizegeragije.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/fobakemiwufopunidarexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/zesuduloruvovojaruli.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/bulonunazuxeros.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/referencias_apa_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/64513826409.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/20182624453.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/12548413352.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/64722344444.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_off0000767d.bin
ea8f7a49f6b964ef65c848b5a07c89b411a80bc626220eaeaf95a72c380bab6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 5260 bytes
font_01_sfnt_off00008872.bin
d3f49fc7ecc9f023b15af80d1adda862b08d7ae79559eba4c109993e10bef840
pdf-font-stream PDF embedded font (sfnt) at offset 0x8872 10348 bytes