Malicious PDF — malware analysis report

Static analysis result for SHA-256 2260b16c40267b6e…

MALICIOUS

PDF

45.6 KB Created: 2020-07-10 05:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b08b69993143d2d2070480cf98119416 SHA-1: 27958a55220e4f6c751ed28dfc64e15bf3d8ec1c SHA-256: 2260b16c40267b6e764d2ed1d01f5b8ade1c004d8ad66ed9df8b6ba85c9cb461
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated but contains references to the URLs, suggesting a lure to external malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wb?keyword=haloalkanes%20ncert%20solutions%20pdf
    • http://files.jeremysony.com/uploads/1/3/2/7/132710704/ruruduvagirodoji.pdf
    • http://files.glenheart.co.uk/uploads/1/3/1/4/131406068/xenipiluwi.pdf
    • http://files.elmermeijers.com/uploads/1/3/1/3/131379781/dubizurusujatimevawa.pdf
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdf
    • http://files.chilcotinoutfitters.com/uploads/1/3/2/7/132741764/mexeku.pdf
    • http://files.longevitywines.com/uploads/1/3/1/3/131379115/sagixomod-rifanim-merofolazus.pdf
    • http://files.lauralrees.com/uploads/1/3/2/8/132815753/474294.pdf
    • https://labajejumiwi.files.wordpress.com/2020/07/bomomupelujo.pdf
    • https://tazesetinud.files.wordpress.com/2020/06/poduzuvegufogod.pdf
    • https://zufiwupaned.files.wordpress.com/2020/06/83055753250.pdf
    • https://vonemimul.files.wordpress.com/2020/06/lovuwewop.pdf
    • https://lorabipuv.files.wordpress.com/2020/06/geripebugaxegitodupeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/serananovuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.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_off0000755d.bin
9fcf0362238ea740507d965f73bdb91effead57d177547552fc683f5242fb861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 5056 bytes
font_01_sfnt_off00008693.bin
a533daf0fa59548fad0cd18306e4af4cc649dfa05985ce3c7718e99db4e682fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8693 10168 bytes

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