Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd51a107076d045…

MALICIOUS

PDF

48.4 KB Created: 2020-08-04 18:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f70d10b5edd701813e37ad5d4c8a42b SHA-1: f5e7dc14ff618a578bb9410a25cbce47d0921f44 SHA-256: 8fd51a107076d045a84eba68e7c712728a1d5d3979b7796764a7a275627a80fc
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure for a 'Payment acknowledgement letter' and embeds a mass of external links, including one identified as a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=payment+acknowledgement+letter+pdf, which likely serves as a gateway to further malicious content. The document's structure and the presence of numerous links suggest a phishing or social engineering attempt to redirect users to harmful sites.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=payment+acknowledgement+letter+pdf
    • http://files.showboathouston.com/uploads/1/3/1/4/131452838/milevumekegen.pdf
    • http://files.bonnieobrientattoo.com/uploads/1/3/1/6/131607010/5e8a9c490e.pdf
    • http://files.stepsforsarcomaevent.com/uploads/1/3/2/3/132303175/2a04d68f9b4d55.pdf
    • http://files.emorymichael.com/uploads/1/3/0/7/130775286/05bea.pdf
    • http://files.silentorchestrapoetry.com/uploads/1/3/1/1/131164114/motel.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/1989_chevy_s10.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/ffxiv_machinist_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/50805708850.pdf
    • https://cdn.shopify.com/s/files/1/0434/8392/2585/files/starting_out_with_java_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/agile_methodology_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/9784593969.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/28999256078.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/biruzuzamukusivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/sazer.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/62012324028.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/50229410838.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_off00007394.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 2828 bytes
font_01_sfnt_off00007d8f.bin
ed1dcde965ccd1399e00904da5224d903eb9fe5b7e33155cb49acfbcc4542966
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8F 5556 bytes
font_02_sfnt_off00009086.bin
fed44adf0fb1ad63f3825c99b0a311e4d29749d4025d0e4c8a7d77cffbff8592
pdf-font-stream PDF embedded font (sfnt) at offset 0x9086 9840 bytes