Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3a43cdf8bcd6a9…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 00:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5889f8be6a40af5a0bcd4e495d10dcfe SHA-1: 396bd68d2d6e15735435dac308519bf878e246d8 SHA-256: 8a3a43cdf8bcd6a98b0f4858b2c8eeb8eb37e608b7a59fa70ff7c880a9dea594
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=australian+immunisation+handbook+guidelines', which is likely used to redirect the user to a malicious site. Another heuristic identified a large number of external PDF links, suggesting a link farm for SEO manipulation or to host further malicious content. The document body, though heavily obfuscated, contains the malicious URL.

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=australian+immunisation+handbook+guidelines
    • http://files.dennispearne.com/uploads/1/3/2/7/132712508/020df.pdf
    • http://files.gilleslafond.com/uploads/1/3/1/3/131397996/xenajusovogozete.pdf
    • https://cdn.shopify.com/s/files/1/0461/0752/5283/files/jenejaranizanunigopaguwiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/barcode_scanner_apps_for_android_review.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/50289018050.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/bullying_acoso_escolar_rosa_serrate_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4654/files/41754213170.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/nisoronuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8697/7949/files/xarewaxebo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/ruvoxul.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/denotixutugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mituvazejuremoposanizama.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_off000068eb.bin
236d0188e68bc6694ba9ff3046882fce17af5aa11aa761f1778d758b32780245		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EB 5432 bytes
font_01_sfnt_off00007b2d.bin
8f211537f799b6dfc5eda292759adefddcd96c5eb13351d5d295d5207483c9bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2D 10156 bytes

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