Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b18dfc815db0a97…

MALICIOUS

PDF

36.2 KB Created: 2020-08-02 11:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51ca35e207bc40480685102bd274941d SHA-1: ba6c3f88a11fc834f83abccc2e19cf40fb3435f0 SHA-256: 6b18dfc815db0a975f41311b96f5bf9b9e98ca9cae866355e368766dacae1af7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a 'dell supportassist uninstall' keyword. This suggests a phishing or malware distribution lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed to obscure the malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

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=dell+supportassist+uninstall
    • http://files.meganrichmd.com/uploads/1/3/0/7/130775677/gufenoji.pdf
    • http://files.modernknowledge.ca/uploads/1/3/1/3/131398224/xuruvudijuwijefiwul.pdf
    • http://files.ryanglancaster.com/uploads/1/3/1/6/131636825/farevegefobib_tafiwisiwoloko.pdf
    • http://files.tourmastersgroup.com/uploads/1/3/2/6/132681783/01b46a.pdf
    • http://files.rivieraalta.com/uploads/1/3/1/6/131607062/5305ae88bbdcf1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/4642/7034/files/kugixagosutazuwojuwej.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/73288296061.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/i_spy_an_alberto_discord.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/nosajanisusivenuvelonibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/kebocode_com_gift.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/starters_lissa_price.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/84419498341.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/beginning_writing_worksheets_for_kindergarten_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/towun.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/segona.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/4526808844.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ef.bin
70724891125a6548a990d7f5f042702a5a0ead75dabfd0891b9695f705ab78dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47EF 4696 bytes
font_01_sfnt_off000057ef.bin
9226b1ab0aad658932807a95148ac1fac591773bfb6af71c5ca247ae234e6c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57EF 8820 bytes
font_02_sfnt_off00007615.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 4324 bytes

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