Malicious PDF — malware analysis report

Static analysis result for SHA-256 623ae4db026c0c3b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-19 03:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75a03ce5dae34ff5294493e6a440700a SHA-1: 9cd7d5c2fb26e5dc9db58e3fac7a9ec77a1408c2 SHA-256: 623ae4db026c0c3b287ca8f4aef5b942faacb4a003a1b9cf38a17439851fec33
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to appear as legitimate content, such as a datasheet for a Fluke multimeter. The primary link, 'https://ttraff.cc/pify?keyword=fluke+179+multimeter+datasheet', redirects to malicious infrastructure, indicating a phishing or redirection attempt. The presence of numerous other PDF links suggests a link farm SEO tactic to distribute malicious content or traffic. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=fluke+179+multimeter+datasheet
    • http://files.elizabethkpetersonlab.com/uploads/1/3/1/3/131384789/sibufajoj-xuvini.pdf
    • http://pemapo.thereedmachine.net/uploads/1/3/0/7/130776394/3285039.pdf
    • http://files.goodshepherdyouth.net/uploads/1/3/0/7/130739379/7647633.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/99640523525.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/lipoduzuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3014/3395/files/viniwagokalinupiziri.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/30659295309.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/expanding_tactics_for_listening_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0447/5109/3914/files/update_xbox_one_controller.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/battambang_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/bodumibivitisakofuwupud.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/73673713808.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_off00005d69.bin
74c63e30988719414042340c1936fa59d9af85381ec7fd085139aa936069f334
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D69 5372 bytes
font_01_sfnt_off00006f99.bin
ef9478404721d2096d66a2dcb8a9ddb2e9f82b21607a0663a6a01b3407430dfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 10492 bytes