Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfb2d5bfae67793…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 07:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50006fe3e84f0cdd013282c3ccce2f3b SHA-1: 6e5e73ab11930270edde9ff5d00130f6b98fabca SHA-256: 2dfb2d5bfae67793e9535cbc0d23f5616afece8d2467c38e2633bedfbe2ec230
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of these links, https://ttraff.ru/pify?keyword=tra%25C3%25A7o+falciforme+doenca, points to known malicious redirector infrastructure. The document body contains garbled text but also includes the same malicious URL and several other URLs hosted on shopify.com and a custom domain, suggesting a lure to external content. The primary attack pattern is the use of these links to redirect the user to malicious sites.

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.ru/pify?keyword=tra%25C3%25A7o+falciforme+doenca
    • http://files.andriamesselt.com/uploads/1/3/0/8/130814235/4303661.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/metallica_enter_sandman_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0436/7597/5830/files/memamutugolapijipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/middle_school_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/animation_in.pdf
    • https://cdn.shopify.com/s/files/1/0432/2872/5405/files/sotogenazarozerujiwojoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kividerinogofigizunewif.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7394/files/calligrammes_apollinaire.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/nexifuwatonaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/lidivaxipobugizusiregale.pdf
    • https://cdn.shopify.com/s/files/1/0434/1186/5751/files/68269862531.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/59671231326.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_off000061a2.bin
146054dee64b323ab6e3ce1cf4c56dada10af2491ea6b8a760c58bbb584e8ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 5120 bytes
font_01_sfnt_off000072a9.bin
4f52a6911166eefac3e631fdb2721a050bc42ad3b807455d8635c8cfade4d663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A9 13036 bytes

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