Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbb20d1b9992e45…

MALICIOUS

PDF

65.5 KB Created: 2020-08-26 16:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a674ec5b652ec03ffb6acbb916a4ddd SHA-1: 95aef44af690ab1fa11edca19decb7cd4a9575a8 SHA-256: adbb20d1b9992e451bacb20db8fee2b6b905aaf3f302eaab42d18c86d5eff02d
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'motorized drift trike plans pdf' and the malicious URL itself, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=motorized+drift+trike+plans+pdf
    • http://files.lilyrennie.com/uploads/1/3/1/4/131406826/f5810a79e6.pdf
    • http://wopupew.brixhambuccaneers.co.uk/uploads/1/3/1/3/131379312/kixavatuzemag.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/68365082365.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0464/3337/0264/files/wikus.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6811/files/autodesk_recap_360_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/basel_1_accord.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/jalikurevovikafo.pdf
    • https://cdn.shopify.com/s/files/1/0463/0354/3458/files/tidexuredimutifidofig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/43943965177.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/lulilodojosiluxu.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_off0000bcbc.bin
4af60081a62a7b7b3718e6e735bae376bd361ac7f83b6e5c264f8bc98614d39a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBC 5152 bytes
font_01_sfnt_off0000ce63.bin
60bc783cff7a730ce5ab1af302bc4105ed4050c950b7d14d1652e4cb6a69772f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE63 13620 bytes