Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a9b2b2094f2e9e…

MALICIOUS

PDF

45.4 KB Created: 2020-09-18 08:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af9c7aed81cb796c85b26a24fc1ae76e SHA-1: 38a3b3d895ede839f84f737c1a3a8534da9039d9 SHA-256: e9a9b2b2094f2e9ec6f2946a0acb4adfecf35ce5d538e1c811e69ba9e751ae3c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link and a large number of SEO-optimized PDF links, indicating a link farm designed to distribute malicious content. The document body text, though partially corrupted, includes the phrase 'Is mpje study guide' and a URL, suggesting a lure to trick users into clicking the malicious links. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=is+mpje+study+guide
    • http://files.christmaswishesbook.com/uploads/1/3/1/8/131856331/5f4718eb200fc4.pdf
    • http://files.jroseweddings.com/uploads/1/3/1/0/131070336/b33835d05efee.pdf
    • http://files.sparkycarpetcleaning.com/uploads/1/3/1/6/131637273/6492353.pdf
    • http://sokekizo.pediatricneurosurgery.net/uploads/1/3/0/8/130874218/xivagup_veguwejufudum_ditidadovujir.pdf
    • http://gutar.callibreezekennels.com/uploads/1/3/1/3/131383544/xalozonozilop-jifajejunetu-satiz-joleb.pdf
    • http://files.champaignsoilandwater.com/uploads/1/3/1/4/131453934/zonemutagugo.pdf
    • http://files.twinwatershealing.net/uploads/1/3/2/6/132682929/bovakugebux-wubimaza.pdf
    • http://tidixej.angeloflifehealthandnutrition.com/uploads/1/3/0/7/130739038/3ea915943689.pdf
    • http://xiwalabev.crestllc.com/uploads/1/3/1/4/131406226/b43f78048af96.pdf
    • http://jumutis.stephanieobrienbooks.com/uploads/1/3/2/6/132681144/zaweto_zasizot.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/12233072192.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/top_simulation_games_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/ude_jab_jab_zulfen_teri_song_free_download.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_off0000714a.bin
be9572e4e32c10d12b0c3404a86d632be7ca414d5e72f7ca5b8ed1446803d61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 5056 bytes
font_01_sfnt_off0000827b.bin
8a974f338607e538f739c2d9e4ca2c3d01db9144d4977adfb9921a8f0e4cc22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827B 10912 bytes

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