Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d10c6ff8a70723…

MALICIOUS

PDF

45.9 KB Created: 2020-08-23 12:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c1c0a823e5a79d8b30b7e1b28102207 SHA-1: fb9b58aa95ec9a4963ab9bfcc5682a9cd5eeb587 SHA-256: 68d10c6ff8a7072306aa74495bfc24f7335b8291c09ca23bceb5414717d2646e
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is part of a link farm designed to distribute malicious content. The ML classifier strongly indicates maliciousness. The embedded URL and the heuristic firings suggest the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=medicare+guidelines+for+bariatric+surgery+2017
    • http://files.unionheightselementary-carthagetn.com/uploads/1/3/1/4/131409135/raxamowonuxem_munimo_buzofirel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/jitilenuvemonovemadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/milijaliduwimilevimil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2852/8799/files/51000465512.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/91857570288.pdf
    • https://cdn.shopify.com/s/files/1/0428/5713/6294/files/fuzawesuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/jojoraw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/tunefefemisivilalizo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2907/5867/files/51423938814.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/kanulobesugutefexav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/voponamive.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/online_photo_converter_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/refrigeration_and_air_conditioning_vtu_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/700722517.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_off00007409.bin
d2465ffec43d94dc0eb432a94758121d9e527b24f48d329155af6cfbf32520ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7409 5844 bytes
font_01_sfnt_off00008811.bin
2f15ed5e0bf03f20905ac23e505bb5497f1e9f0976f46d8dac7b4896d5823098
pdf-font-stream PDF embedded font (sfnt) at offset 0x8811 9996 bytes