Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51759e39cbd3a54…

MALICIOUS

PDF

41.3 KB Created: 2020-08-23 15:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3e49a5455fa7efa4e239692e39d806e SHA-1: e1b5dc533850a79b738325b6a6e66834832b0860 SHA-256: d51759e39cbd3a54a8df5dfb49a9e706468e849f411800a6ac671833a4852e05
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a weather report, which is a common lure for phishing or malware delivery. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or traffic redirection. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ktva+weather+report
    • http://fujujev.columbuschristianacademy.com/uploads/1/3/1/8/131856666/8144215.pdf
    • http://tojupi.avisplacechildcare.com/uploads/1/3/0/8/130814579/343cb82584b.pdf
    • http://gamuke.sojofireproject.org/uploads/1/3/0/7/130776167/48bda1ad87d0.pdf
    • http://files.authoresstawanabourne.com/uploads/1/3/1/8/131871633/8746092.pdf
    • http://rijin.lovelifeagain-lifecoachingmore.com/uploads/1/3/0/7/130740013/pekuwaronalatiliviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/wodonifab.pdf
    • https://cdn.shopify.com/s/files/1/0434/1016/1820/files/63161043209.pdf
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/jkbose_date_sheet_12_class_private_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/82789329533.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/joker_graphic_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/wegelobovizeladejuzorudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/vunimazokusonutegu.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_off00006583.bin
0904fd71bd6bc18147a8e0594faf6e8f654182eccbb223747e34846a8a1a4d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6583 4820 bytes
font_01_sfnt_off000075f7.bin
d366c3e70a9ddf52e244881d4f95f5e617cf48a593791813277e678106faf791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F7 10228 bytes

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