Malicious PDF — malware analysis report

Static analysis result for SHA-256 24301c824f3a10dd…

MALICIOUS

PDF

42.0 KB Created: 2020-07-31 23:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149227444ed4bb36aa889934ba457447 SHA-1: c6e5a5b8c8b511d497d0ee9d1709ab116b626db8 SHA-256: 24301c824f3a10dd419dc3173cd63289661a34a645383816b2a25316fdba527e
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=all+i+do+is+win+clean', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=all+i+do+is+win+clean
    • http://files.teenhomeschoolingaustralia.com/uploads/1/3/1/4/131437792/jazis-sevaposaxasepe-zadovopiziza-votupedo.pdf
    • http://files.russkinkade.com/uploads/1/3/1/3/131398322/mozurejibo.pdf
    • http://files.renichedfurniture.com/uploads/1/3/0/7/130740130/2a3e3a9e17d.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/62524358264.pdf
    • https://cdn.shopify.com/s/files/1/0435/4995/0116/files/45568613593.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/tepuradifom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/ninoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/36137631585.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0435/7026/6273/files/nakafiwonolas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/damuzibapigeno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/movug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/14902011627.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/zasudaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/49556479204.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_off000066e9.bin
e15b0b87e30429e61833172b51bf838c37f2e75f37fbed07977b3f77ce131fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 4920 bytes
font_01_sfnt_off000077cc.bin
cf5f3c9a19de0ff857e349304dee6f9550d3e9eb234832db9788156bb167e7a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CC 10452 bytes

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