Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55ecdd5b6440af2…

MALICIOUS

PDF

38.5 KB Created: 2020-08-23 09:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7243167571110c152a415261525f9b97 SHA-1: 7b5e6a15b7a65f1b2d326eb8bd17da09d8bc4d52 SHA-256: c55ecdd5b6440af28fb9f64cac21fe73091fde8452454c28670f162e348bdbc0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the primary malicious activity appears to be redirecting users to potentially harmful content via the embedded links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=authorization+form+template+word
    • http://files.thinkgrafix.net/uploads/1/3/0/8/130873877/likuwijolulel_pagipojiku_walovufew_bereru.pdf
    • http://files.dianastanton.com/uploads/1/3/1/8/131856247/6606533.pdf
    • http://files.just-beecause.com/uploads/1/3/1/3/131383284/7504712.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/5515259897.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/97976436349.pdf
    • https://cdn.shopify.com/s/files/1/0434/2192/5543/files/book_for_learning_japanese.pdf
    • https://cdn.shopify.com/s/files/1/0433/3436/9438/files/100_branches_of_biology.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9315/files/php_xml_request.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/pizigaxufifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/diana_hacker_a_pocket_style_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/67989437038.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/66579685070.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/92607762432.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/1583808399.pdf
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/biogenesis_teoria.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058fc.bin
246f882ce87d374be8417a6a56a0a41b65a07c71de1c3e12875a51f19dbb23ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x58FC 5236 bytes
font_01_sfnt_off00006abd.bin
4042527ddc9985e894186d0c4826d5766a359d62c69d0a550f5154ea576c64d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABD 10084 bytes