Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6701c37edb360a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-23 00:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59abdcf39d217d7f06485496c1236e68 SHA-1: 7622d9368e9e4b430eda5eca663194a2e5c5e5c8 SHA-256: 5e6701c37edb360a4c8fad74ee11e9563ac7ba66d292478b2b1ef1a1750f330b
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body and embedded links suggest a lure to external content, likely for phishing or malware distribution. The presence of multiple links to external PDFs, some benign and some potentially malicious, indicates a link farm strategy to obscure the ultimate destination.

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=single+activity+android+app
    • http://files.cenutrifit.com/uploads/1/3/1/4/131453284/14d47c0a38e0b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/81722687841.pdf
    • https://cdn.shopify.com/s/files/1/0440/2996/8534/files/72880835711.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/ac_dc_back_in_black_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/compress_mac_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/math_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/78351644422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwofejimu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/piping_isometric_rolling_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0434/7373/1741/files/barycentre_premire_s.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/rowilinuwefawixejupetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/degesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/6593991015.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/bovine_viral_diarrhea_virus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/29957155221.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_off00006fdd.bin
4b5422e205e512b028353cd77d4fe4eeded4e4369c6e9ebe1db6487b097da6de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDD 5328 bytes
font_01_sfnt_off00008208.bin
5b5aa7231c3b00f1d69f4213126b804fc1ff3bbf978b24006095b4867cd0f794
pdf-font-stream PDF embedded font (sfnt) at offset 0x8208 10440 bytes