Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed8b4b7f9d75c7c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 08:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 708c8a695709eebc18b1b46fadad06b9 SHA-1: 9f13d2305ca42bce6ee57a4ee6b64bc030f177f2 SHA-256: 9ed8b4b7f9d75c7cbe312be70c467f66cbabeab5e514354a19dd7226489f8e80
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=dursun+ali+erzincanl%25C4%25B1+mira%25C3%25A7+fon+m%25C3%25BCzi%25C4%259Fi+indir'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links, some of which are to benign-looking PDFs hosted on CDNs. The presence of a 'download button' heuristic further suggests a deceptive user interaction is intended. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links within the PDF.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=dursun+ali+erzincanl%25C4%25B1+mira%25C3%25A7+fon+m%25C3%25BCzi%25C4%259Fi+indir
    • https://static.usrfiles.com/ugd/0511f5_b5db6069450d49a6816122d0355b6a96.pdf
    • https://static.usrfiles.com/ugd/822ecd_1ef902d40de148f4aac4e06748e1d5d2.pdf
    • https://static.usrfiles.com/ugd/1df9ea_a671e88995e545bda9e980776c542df6.pdf
    • https://static.usrfiles.com/ugd/71fd01_999b4ab445a04e7294d4de5225f01e2d.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/boursorama_protection.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/jiwujuxusajikojibug.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/justin_bieber_baby_lyrics.pdf
    • https://static.usrfiles.com/ugd/b8c837_0160fc993db34c7eb2f1e115e230068b.pdf
    • https://static.usrfiles.com/ugd/d3758e_47e9c029425d4b418dd04ab291a1195c.pdf
    • https://static.usrfiles.com/ugd/4f270c_9f2e7a6aa4c64ee19f3bb10009ac1fb9.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/nufotoxokasapapen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/best_rom_site_2019.pdf
    • https://cdn.shopify.com/s/files/1/0464/7138/1160/files/sap_report_invoice_sales_order.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/the_walking_dead_s08e04_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/cleo_apk_download_gta_vc.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000454a.bin
d85645f29c95bb5849d4d1f0c2924e4d5321661cc2e684619a8bcee95d14da1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x454A 5580 bytes
font_01_sfnt_off000057b2.bin
22fcd578b311c1abb8c5cd014c915defdcf006d75ed4a66fb37cbf8ff8fd1a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B2 11268 bytes
font_02_sfnt_off00007c5e.bin
38fcf4ea3c4064495b9c09a7ef6946f56b1194f5b917bad2175a3786c2c34ca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5E 16132 bytes
font_03_sfnt_off00009154.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9154 4324 bytes

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