Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b29c9442382ef0…

MALICIOUS

PDF

46.7 KB Created: 2020-07-29 16:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000ccaead618c39115ebdfce07ea8e13 SHA-1: 354ce954142ef3b934fd479b3272be07100f1133 SHA-256: b7b29c9442382ef0cc25afc831b29160cd20b5eae55ffd7ba4499b8d7806f696
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to ttraff.com. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to external PDFs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to educational materials.

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.com/wb?keyword=r%C3%A9sum%C3%A9%20cours%20physique%20chimie%20seconde%20pdf
    • http://files.ahlivintage.com/uploads/1/3/2/6/132681865/tezivukuv.pdf
    • http://files.holes4hope.com/uploads/1/3/0/9/130969390/solofubi.pdf
    • http://files.barnopera.com/uploads/1/3/2/6/132682386/377cee7bd090d.pdf
    • http://files.trustableslut.com/uploads/1/3/1/4/131408209/1317571.pdf
    • http://files.annalwalls.com/uploads/1/3/1/1/131164574/7e1d1.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/jamamoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/13130787192.pdf
    • https://cdn.shopify.com/s/files/1/0436/6319/6310/files/takadoserukawebexafakajep.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/podududugarelebizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/46038429716.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/durilasabotezodiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/rowutexibudog.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/65846315616.pdf
    • https://cdn.shopify.com/s/files/1/0437/6392/5149/files/zefidarefida.pdf
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/71146050016.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/gerebexosoziverizajagola.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_off00006f10.bin
48ea7b32528b0b34ce4941debe39ba985bb192a24474c29979dfdfa96cab23e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 5332 bytes
font_01_sfnt_off000080ca.bin
f2b4e7e0602bae5f00dc9bf7a63e43d167eb175f8e48435be02c7fe751870a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CA 14016 bytes

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