Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2a8a04db2de27d…

MALICIOUS

PDF

55.5 KB Created: 2020-08-02 19:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013432c3097efe057b690ad953ea7abc SHA-1: 695b175bb3f177fff625be0ad758ca353fb868f3 SHA-256: 3b2a8a04db2de27d7dba57b02d691be670479599d995948c55ff67f5333d228f
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The majority of these links point to a link farm hosted on Shopify, suggesting an attempt to manipulate search results or redirect users to malicious content. 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=css+flex+overflow+wrap
    • http://files.aftasmirleft.com/uploads/1/3/1/6/131607053/pewugenufupokojesod.pdf
    • http://files.spyderman.com/uploads/1/3/1/4/131438823/bibijuk.pdf
    • http://files.vintagesoapworks.com/uploads/1/3/2/7/132740598/6694813.pdf
    • http://files.lesprihaitimission.com/uploads/1/3/1/4/131406182/3256877.pdf
    • http://files.sfidinc.com/uploads/1/3/0/7/130776158/bedujumerad_tafis_vavewedalogisad_zumuruwuladu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/favodisutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/bagezijotokubew.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/vunuwijajubefir.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/11622186228.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/rulopizimafanapunet.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/latuzigifekowapigikukoto.pdf
    • https://cdn.shopify.com/s/files/1/0440/8236/4566/files/teluges.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/66623807297.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/61135554015.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/bifififibelozaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/panage.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gopag.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074b2.bin
4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B2 6588 bytes
font_01_sfnt_off0000852b.bin
e97eb9478af0da2627732a71e727792f152aea9bcc0a7735dca6418a221aabd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852B 5020 bytes
font_02_sfnt_off0000965d.bin
317796c2c00a5f25579096aab0c97555d5800d4a16d88792a982ba95f6fcaa01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965D 3660 bytes
font_03_sfnt_off0000a4d2.bin
10677019db8c4e59f31f1ccb6b79b7e2e2cefef1a74000c25dc73c6a74f1dca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D2 10300 bytes
font_04_sfnt_off0000c7f2.bin
1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F2 1736 bytes

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