Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6389c9e9e8b743d…

MALICIOUS

PDF

33.5 KB Created: 2020-08-11 06:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de16e0b9a17f1f13cae0213afc1db0b SHA-1: 8f34f985e9e12d8e36da5dcaca819dc1f6e8ce9a SHA-256: a6389c9e9e8b743d31993b570c74d1382e83bfff654e8ecbe112866742fcbe74
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=liggghts+tutorial+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains references to the redirector URL and other benign-looking Shopify URLs, suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning tactic.

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=liggghts+tutorial+pdf
    • http://files.mnconference.org/uploads/1/3/1/4/131407178/3536282.pdf
    • http://files.performingartsworkshops.org/uploads/1/3/1/3/131384777/zejapepuzufozodipa.pdf
    • http://files.bettyscountrykitchen.com/uploads/1/3/1/4/131482976/wamiketez-daporapigugid-rakef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/10643747023.pdf
    • https://cdn.shopify.com/s/files/1/0449/9701/7768/files/faa_form_8610-_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/55398009820.pdf
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/1835725947.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/83933514912.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/fopenujavumiralob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/2309779609.pdf
    • https://cdn.shopify.com/s/files/1/0445/3584/0932/files/i_ching_wilhelm.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/xefefenuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/30145805929.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_off0000455a.bin
e8b5ed17df104e9b6f5c28a7e6288cb1a97c24790758946f7e2a6bef5fe7ebb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x455A 5244 bytes
font_01_sfnt_off00005735.bin
4f3cf283e3af358626f784ec4d1a3c0c6d88f3fb565d3f8be188ebe8e19fd238		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5735 9948 bytes

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