Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d6d938b8d85615…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 16:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c275868c525428b1da90f15b502d01c7 SHA-1: d4bde25d36701fb6f6dbb84519aca604394c44d3 SHA-256: 52d6d938b8d8561560736fc745085a708e70862e75ff42cf2ef38250450c7865
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through deceptive links within the document.

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.ru/pify?keyword=arrondissement+du+cameroun+pdf
    • http://files.amores-project.eu/uploads/1/3/1/6/131606150/belit.pdf
    • http://toxufu.albertaatlatl.com/uploads/1/3/2/6/132681556/9710526.pdf
    • http://files.destinybydesignonline.com/uploads/1/3/1/6/131606046/wujaden-kezerelepuka.pdf
    • http://jodufajob.littleheathensranch.com/uploads/1/3/1/4/131453541/92325.pdf
    • http://files.sachagrosselart.com/uploads/1/3/0/7/130775634/lulekakemarov.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6629/files/rawava.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/gba4ios_ios_8._3.pdf
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/41826694405.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1119/files/xafufepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/potafewipediwif.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/bootstrap_justify_content.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/bixowunij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4577/files/.pdf
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/balthazar_s_marvelous_afternoon_short_story.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/vigukobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/kenmore_70_series_washer_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/guxojuvejufufelunuzilelu.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_off00005e5f.bin
d3e0d6bc7ae01aa2c1e9107a81b94063cda2df792dc391f0fa95c8cb674455fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 5260 bytes
font_01_sfnt_off00007021.bin
dc1696daaa1f05baf8623f5734fe42b0223f4fff72d47a2c1c11053d53d54a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7021 10584 bytes

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