Malicious PDF — malware analysis report

Static analysis result for SHA-256 2318c3c9bb8d7ce4…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 02:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a752d7a4e2e0597976a78f8aef3b1927 SHA-1: 9fc7c5a4608619d717e0a9f5b9854efd74b025fd SHA-256: 2318c3c9bb8d7ce403ce7a150e6b426879d311da9d5044595ce8f50a88e11abe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Bible faith study course pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.cc/pify?keyword=bible+faith+study+course+pdf
    • http://files.lovespellsaustralia.com/uploads/1/3/1/4/131483002/wofenugop-musirazotasa.pdf
    • http://files.authorlynnburke.com/uploads/1/3/0/9/130968996/c85d1dfd8fec96.pdf
    • http://zetipor.kansaspoets.com/uploads/1/3/1/1/131164250/6232448.pdf
    • http://wadowadu.pratermusicfest.com/uploads/1/3/2/6/132695615/vukowoguwa_kagimaremajerid.pdf
    • http://widigubiw.hormoneandwellnesssolutions.com/uploads/1/3/2/3/132302780/basegepam-kujozunad-rojikidinozoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/pabirofuzawewowigubiwitis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/78796242846.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/77796875538.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/kuzigesava.pdf
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/antiepileptic_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/witupibobebin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/asphalt_paving_equipment.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/xuwifapox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f0d.bin
062ffa69354f34b17232b22443b85309967129745f252651cd3e16910ee87d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0D 5308 bytes
font_01_sfnt_off00006129.bin
43786ea3ae0f3f110d285c415abfdf9f6bfc222f8c7c452b4c3a6444d6999195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 10108 bytes
font_02_sfnt_off000083dd.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DD 4324 bytes

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