Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f45ef20e37bf8a…

MALICIOUS

PDF

38.5 KB Created: 2020-07-29 01:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c592cc1a25b071f61cf03995a01ce7a SHA-1: 5049b7c3d94cc8607781844d8e59ddceaa6839ac SHA-256: 12f45ef20e37bf8a7cc44c9ab5be91bf023539510d11d0ba1f83055ff012b387
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is part of a link farm designed to host numerous other PDFs. The primary URL, 'https://ttraff.com/pify?keyword=24+piece+makeup+brush+set+guide', is identified as malicious. The document body, though heavily obfuscated, appears to be a lure related to a makeup brush set guide, likely intended to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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=24+piece+makeup+brush+set+guide
    • http://files.nanoassembly.org/uploads/1/3/0/9/130969115/fasevos_mopid_zetuzaver_legutovakafor.pdf
    • http://files.tavernwisports.com/uploads/1/3/0/7/130739398/3312726.pdf
    • http://files.jessicafeldheim.com/uploads/1/3/0/7/130739061/zunevofin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/9412976818.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/93756237395.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/11108943466.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3233/files/21352921837.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/88717070844.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/88505623044.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/16160486716.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niriliruvurufuwupaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/50036094931.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/medadunepuxalinadusozipaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/minuvuzaditebatev.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_off000059cd.bin
a8a4a56036271e782898fb16458bb0a4720c2d1eed5b393518c2dc166581772f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CD 5448 bytes
font_01_sfnt_off00006c47.bin
ffc3c33c3e86f10187c7bd18118758895e95e527eb876dad9e2ed6360c4c96ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C47 9580 bytes

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