Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e58e903a5120b16…

MALICIOUS

PDF

45.7 KB Created: 2020-08-14 01:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd5aafb23e445515973dce730a363b4 SHA-1: 1018d1e3cc45730ef826105ed653a114b7c879e6 SHA-256: 1e58e903a5120b16f24e03c5e883e955aac1ada02d210fd97e2bfd9ab31d4946
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, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and numerous other links, suggesting a link farm or redirection attack.

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=bioshock+infinite+dlc+achievement+guide
    • http://files.calgarynaturopathicdoctor.org/uploads/1/3/1/3/131398589/5c2660.pdf
    • http://files.reikiwomb.com/uploads/1/3/0/7/130739628/1003493.pdf
    • http://files.northunitedmethodistchurch.org/uploads/1/3/1/4/131483584/siginasumawuged.pdf
    • http://mosezonob.dmcihomesonline.com/uploads/1/3/1/4/131409090/9764681.pdf
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/fevokateleguwupuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/limbajul_trupului_allan_pease.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/leromorivalo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/how_to_check_graphics_card_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/4868/9050/files/84378906750.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/94229034712.pdf
    • https://cdn.shopify.com/s/files/1/0433/1280/8091/files/ap_transco_ae_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/spinal_cord_injury_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/kuranaxuxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1416/files/84996919004.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/fuvakegoraxufalej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a5.bin
01860fc3bc87283efa07ff92b7de0fde624a425e96d752de1ec56d6d74362379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A5 5396 bytes
font_01_sfnt_off000078db.bin
200bbf70b4bc84153bf33904380408e302c9d633fb30c182c0cb5bb62f8e3214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DB 10212 bytes
font_02_sfnt_off00009be7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE7 4324 bytes

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