Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee1dee2aa23b62d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-26 10:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3651303089bb0645692407d28c31e8d SHA-1: 62866610b097014c9445963fd5e127bba81ae5de SHA-256: bee1dee2aa23b62da14650f2149720f410543eeb832625a8c80d36888efaa273
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are hosted on Shopify but one points to a suspicious domain (fikub.valeriepaykov.com). The primary malicious link, ttraff.cc, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to the book title and the malicious redirector URL, suggesting a lure to external content.

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.cc/pify?keyword=libro+ventajas+de+ser+invisible+pdf
    • http://fikub.valeriepaykov.com/uploads/1/3/1/0/131070420/19a0c75a.pdf
    • https://cdn.shopify.com/s/files/1/0437/2276/8538/files/bewafa_hai_tu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/81702263199.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/21707356077.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/76361698497.pdf
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/wuzisezasafofaxadigadu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/71241058786.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/gerawulizonolamav.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/circle_equation_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/81654518362.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_off00006f1c.bin
239402e33daa61a775d46dd3a20559e000229a92e409ac0483b37e5674ae30ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1C 5252 bytes
font_01_sfnt_off00008104.bin
b8ba49280fafcb9231040cd34f19a2066f98de6a3466ac8f9e307fd808f06c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8104 11248 bytes

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