Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d681c8553917034…

MALICIOUS

PDF

48.7 KB Created: 2020-08-14 22:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c79bef94232e90e2ff8192ead82d785 SHA-1: f0d606e4000ae4d01d4677bdf289d99126720bc8 SHA-256: 9d681c85539170345e599a144316f550707823f534bf763280a223eeb29d4a36
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body itself is largely unreadable binary data, but the presence of the redirector URL and the heuristic firing for a PDF link farm indicate a likely attempt to lure users to malicious content or manipulate search results. No scripts were extracted from this sample.

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=platform+as+a+service%2528+paas+definition
    • http://files.jendallandco.com/uploads/1/3/1/8/131872087/1850233.pdf
    • http://files.bespokebewitched.co.uk/uploads/1/3/0/8/130874457/9505374.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/high_five_emoticons.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/dictionnaire_bancaire_franais_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/clinical_laboratory_hematology_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/39423705296.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/20868323961.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/likowukadeluw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/believer_imagine_dragons_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0434/1976/2855/files/angela_carter_tiger_s_bride.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/muwar.pdf
    • https://cdn.shopify.com/s/files/1/0438/3539/2150/files/10901808684.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_off00008008.bin
eab891f12422f912fe904896b849dd316c675fb49ae4e39acb87cec41a483d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 5440 bytes
font_01_sfnt_off0000927f.bin
db789c28c08df6688a646d317ed2c0c31c17849bfc54d4abd6474b88c33006c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x927F 10376 bytes

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