Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a8db7400c8d6a7…

MALICIOUS

PDF

39.4 KB Created: 2020-08-17 05:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20525ad23448b368fb95111eb7910b7b SHA-1: 9bfb66c416f127df35b51f20517e3494dab6ad77 SHA-256: a6a8db7400c8d6a78ccdcb5b418ae85a1020f1c11970e13f30306482786bedd3
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. One such link, 'https://ttraff.cc/pify?keyword=tombow+practice+lettering+sheets', points to a known malicious redirector. The document body contains garbled text but also includes the same URLs, suggesting they are intentionally placed. No scripts were extracted, but the sheer volume of links and the malicious redirector indicate a likely phishing or SEO poisoning attack.

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=tombow+practice+lettering+sheets
    • http://files.aidankeaneart.com/uploads/1/3/0/9/130969695/2840899.pdf
    • http://files.greenentree.com/uploads/1/3/2/7/132740949/bilovozomizamuw.pdf
    • http://files.findingbalanceessentials.com/uploads/1/3/0/7/130776166/91818.pdf
    • http://files.efmracing.com/uploads/1/3/1/3/131383943/tirakavonu-gopefomonidimij-fotedamojulo-posugazizajap.pdf
    • http://bezoname.hollarchiropractic.com/uploads/1/3/1/4/131453177/banodisetinumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/xolifineliji.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/weviketumekeru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/26913772624.pdf
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/linux_administration.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/rokejonovowikesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/16348949456.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/banajoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/95141178462.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/electronics_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/33182198180.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_off00005be8.bin
ac1e25b3bfe94433b9de1ab14ddb3400988e66ed0a9cdda11fc906cc12616093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE8 5528 bytes
font_01_sfnt_off00006e90.bin
1be22c411822741b734eba325743a00b7837ce385ef8531965c27d354d909ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 10024 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.