Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f71ad53329001d3…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 08:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05c08bd55049ec1a6bd986ef10ef4613 SHA-1: a803edad4d64562181cac3ddd22ccff747d5575c SHA-256: 9f71ad53329001d38c146fd188c2f5c0bdfe7dcec37d533f27eea0ec34c35f5a
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 pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a lure to download further malicious content or redirect to phishing sites.

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/pify?keyword=t%25C5%2582umaczenie+zda%25C5%2584+angielski+gimnazjum+pdf
    • http://zofetat.davidwaltersministry.com/uploads/1/3/2/7/132710712/lijujaju.pdf
    • http://files.paulsonisles.com/uploads/1/3/1/3/131380733/ziloziguwavupik-dakefetiganeso-nomamugugina-mebamud.pdf
    • http://files.thorneaircon.com/uploads/1/3/1/6/131637546/jujokeb.pdf
    • http://files.swfchinese.org/uploads/1/3/1/6/131637125/punoj.pdf
    • http://files.dupageanimalfriends.org/uploads/1/3/1/4/131406391/7521643.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/bajumagememirimuwojiluku.pdf
    • https://cdn.shopify.com/s/files/1/0437/8722/3198/files/faronopemeximabikimemijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/fmea_aiag_vda.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/soluxazi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/adventist_28_fundamental_beliefs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/52343674379.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/ponedibobawejaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/72787337576.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/janosoxezetakumozo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/zamadosatipowiviza.pdf
    • https://cdn.shopify.com/s/files/1/0446/2955/7411/files/celtic_alleluia_sending_forth.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_off0000646a.bin
7f3ee473a3c2b7c98e18845b8e6b4c151c921fa98cef96a494e034163dad6821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 5704 bytes
font_01_sfnt_off0000779f.bin
ce9bf7815686a7e05f3b46c47b509c64ef6e238948107d8fef605f5432b92888		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779F 11596 bytes

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