Malicious PDF — malware analysis report

Static analysis result for SHA-256 be32b77f1b742add…

MALICIOUS

PDF

39.0 KB Created: 2020-08-17 14:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5dd5e9e84c52c7e08d282ca70bf657a SHA-1: 5c24ac2d71f3f06748ee44f35753b6dec979652e SHA-256: be32b77f1b742add21aa0cb8cdd2a5a6351cabcf2ae37503f9f10bdc37b206fe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=kindle+android+read+pdf'. The document body, though heavily obfuscated, contains text related to 'Kindle android read pdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. No scripts were extracted from this sample.

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=kindle+android+read+pdf
    • http://musokof.xiroxonenews.com/uploads/1/3/1/4/131453645/rubem.pdf
    • http://files.artinspirationbyrose.com/uploads/1/3/1/8/131856602/borebadobus.pdf
    • http://files.myvitalessentials.com/uploads/1/3/1/6/131637240/wapim_sipixolefoninam_funibokogej.pdf
    • http://files.vialinden.com/uploads/1/3/1/1/131164157/dutopakinet.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/81940078864.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/bacaan_sholawat_burdah.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/19507681379.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/wowuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3367/files/behringer_x32_rack_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/12_time_table_2020_science.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/introduction_to_linear_optimization_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/51338295727.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/47796847264.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_off00005d11.bin
242c884bc32ca6a2af9e40846ab47400c409a62a8f10ba153bcfb2ffe4a0f6ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D11 4828 bytes
font_01_sfnt_off00006d86.bin
9497559172316ebd65b344ee18649e5ecaf004b60e6e55a5241ec6933a3f584a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D86 10008 bytes

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