Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ce90e7fb82649b…

MALICIOUS

PDF

43.7 KB Created: 2020-07-29 19:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 660540c31fcb97373ba520b843bea49f SHA-1: 79ff673893f38b67175d9cee6be2c809015a884d SHA-256: 85ce90e7fb82649b40d45241065bebfa19e6169d01c1483fc7928e25e08886e2
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, a technique often used to obscure malicious destinations and engage in SEO manipulation. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to PDF conversion, aligning with the malicious link's purpose.

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/wb?keyword=converter%20pdf%20em%20word%20online%20gr%C3%A1tis
    • http://files.premierpoolsga.com/uploads/1/3/0/7/130739646/xinikijopi_segeme_jubidi_jalirigatawele.pdf
    • http://files.twolabyrinths.space/uploads/1/3/0/7/130739713/54aaa74b294c.pdf
    • http://files.judimorningstar.com/uploads/1/3/1/8/131856333/tojedulipuba.pdf
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/kezupafebugojogokaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/monov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/55768403103.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/48741054562.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/32969545009.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/77221448454.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/tameporufasevibexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/560201430.pdf
    • https://cdn.shopify.com/s/files/1/0431/8619/2546/files/dederologolizorudipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/xejimenisikori.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_off00005eb5.bin
87159473af435f0c2795bf15b9b8e36ae9ab0e0574e3fa2c16075d9c786842ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB5 5348 bytes
font_01_sfnt_off000070e3.bin
01eeb6391fd1d0c0eb8de48fa6d83c3fd173b9a5dedd9d71342218627389572a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 20024 bytes

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