Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04d2d49c0acaf0b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 05:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 900e49f7c36003112c8481ba7f845c42 SHA-1: 4fb490de1d9bbc5436e31ccc55132226f2eaa740 SHA-256: b04d2d49c0acaf0b348e22d8eb5ed31b1776747b2e05ee70c62fdb51f720e121
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body and heuristics suggest a lure impersonating a document signing service or a PDF reader download to trick users into clicking the malicious link. The primary malicious URL identified is https://ttraff.cc/pify?keyword=pdf+file+reader+download+app.

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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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=pdf+file+reader+download+app
    • http://files.ocburritoproject.org/uploads/1/3/2/7/132712315/fegudekeg.pdf
    • http://pufijukim.remodelingbymartinbrothers.com/uploads/1/3/2/6/132682883/4138277.pdf
    • http://files.mindfulmethow.com/uploads/1/3/0/9/130969851/xofujanabojavu.pdf
    • http://files.canaseragafestival.com/uploads/1/3/2/6/132695244/5337395.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/63010247676.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/coveted_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/fowiwugon.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/logajigiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/quicken_2015_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/96925898372.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/63632177945.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/55379317212.pdf
    • https://cdn.shopify.com/s/files/1/0440/8583/7989/files/convertir_un_escaneado_a_un_word_editable_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0454/2182/2120/files/chemistry_formula_sheet_college.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_off00006794.bin
5ae18c7c071d25c0f4df4dd4540c1db97fa25ca649efc1339e7b4caa9f187db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 4948 bytes
font_01_sfnt_off0000788e.bin
9c697c9920a1afdc67da01dd6a417d78014af3261d684b83ef9f94491547bfc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788E 10196 bytes

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