Malicious PDF — malware analysis report

Static analysis result for SHA-256 8582f00501f784f8…

MALICIOUS

PDF

112.3 KB Created: 2020-08-22 15:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49fa13d0f35466c00b13ac35cedbd9fc SHA-1: 66e1987b739fa06c6cb65e5d94d3c76d182ba63e SHA-256: 8582f00501f784f837245c27fbe16338538a8d9958bdfe24d1bd77913181542c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, many of which point to benign Shopify domains, but one prominent link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector URL suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cour+atomistique+smpc+s1+pdf
    • http://files.randolphroadrunners.org/uploads/1/3/1/3/131383743/jarexunuzutelemufa.pdf
    • http://files.richardkfitzgerald.com/uploads/1/3/0/9/130969808/rumanezuvod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/csgo_1v1_commands.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/wigijinuvekaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/zojuberupitipux.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/52459785348.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/81867336641.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/25886669690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/python_os_delete_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/memexupimokevakex.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/setemoraxitidu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3522/8317/files/redopazitu.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159f4.bin
0c9b13bf1d6a49b3a68acd06145f7b100b33b02f93075cd76d08b23ba871ee78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159F4 5352 bytes
font_01_sfnt_off00016c17.bin
51fa2baa1c6547b498085691677d3b10b8737835b31b2497c0791897bf46fe10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C17 15812 bytes
font_02_sfnt_off00019ccf.bin
8f05093dfe4612ccfdfcd7ffaaa96703152f4d99699df71a4103ff45cd287a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19CCF 16728 bytes

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