Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43a7d2ac619e1d4…

MALICIOUS

PDF

67.6 KB Created: 2020-08-20 04:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 760de514456231bc5dee333b52e34051 SHA-1: 37b513b7d15d18f8fa46138bea7e1037c51e49d7 SHA-256: a43a7d2ac619e1d4a9dbeaab6e9301ce757815bdb9813b20d0dc35faada504c3
120 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 'https://ttraff.cc/pify?keyword=api+platform+pagination+false'. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, many hosted on benign platforms like Shopify but likely serving as decoys or part of a larger distribution network. The document body itself is heavily obfuscated but contains the same redirector URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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=api+platform+pagination+false
    • http://jutavok.ambiguouslyaj.net/uploads/1/3/1/3/131383297/pupanapowawajolixux.pdf
    • http://files.absolutelypaintedfaces.com/uploads/1/3/1/6/131637211/9c41905c90d6c4.pdf
    • http://files.intentionalmba.com/uploads/1/3/1/4/131437045/sosegadasalufesupi.pdf
    • http://derudukaw.fusetheatercompany.com/uploads/1/3/1/6/131637881/pubofipivew-bakosabot-xivepala-dogof.pdf
    • https://cdn.shopify.com/s/files/1/0445/9141/5460/files/chunking_information_data.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/mavurapusa.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/coagulant_and_anticoagulant_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0431/6427/0743/files/turaw.pdf
    • https://cdn.shopify.com/s/files/1/0448/8167/4407/files/72006305694.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/caracteristicas_del_estado_liberal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5218/7298/files/excel_worksheet_defined_names.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/20959878369.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4136/files/love_birds_wallpapers_free.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_off0000b956.bin
c769f584fef19f55c9b089dd23c947dc941b9392218126d9689e01de8f641d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB956 5212 bytes
font_01_sfnt_off0000caf6.bin
a59f4e47cbee0397955130bd8d419a2b65bc7aff7540097c0744b64a4968c601		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 17028 bytes

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