Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65b38830a353ec9…

MALICIOUS

PDF

42.6 KB Created: 2020-07-24 09:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6b249034a9020247945d77ff9c9a8de SHA-1: 71bef0a8eb68ebc0114cf06c196c2a473f54de4e SHA-256: a65b38830a353ec96a4edffcbae751bf967f1a3ecbe994213e4cc01034d641f8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is used in conjunction with a lure document that appears to be a user guide. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm for SEO poisoning or distributing malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=user+guide+gopro+hero+7+silver
    • http://files.totalresetweightloss.com/uploads/1/3/0/8/130814126/jowopadizitovexa.pdf
    • http://files.gulfsidesports.com/uploads/1/3/0/7/130776714/nugisurofep-vuloxise-xojuzobepa.pdf
    • http://files.mccaughanpublishing.com/uploads/1/3/1/8/131871651/6562528.pdf
    • http://files.webeegardeners.org/uploads/1/3/1/1/131164153/givezeretalowi_wumir.pdf
    • http://files.mccaughanpublishing.com/uploads/1/3/
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/66226077100.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/91447952733.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/5489441550.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/gegavobemirezekikebewane.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/sogubuwejorunevabaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/guduxuvabivotetaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/43993648395.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/92628446544.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/37338921843.pdf
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/bugirifirilonukevikefuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/95888941486.pdf
    • https://cdn.shopify.com/s/files/1/0434/1088/2727/files/43746747156.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_off00006a6a.bin
fcb8acdd841be2ac3fb185f7fc921aff848922ea797f1dcc8fe16079603e2762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 4840 bytes
font_01_sfnt_off00007af2.bin
6c784c14c0aaef7776adaf9cdf0aa3b8eb600c87ceed33b2ac732f595d04e36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF2 10084 bytes

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