Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a09d2f70283448d…

MALICIOUS

PDF

118.3 KB Created: 2020-08-04 10:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d442c639437177f3531a4ee809fbe9d5 SHA-1: e7b5658629da8e860f40c68127788403eb584c0d SHA-256: 1a09d2f70283448d89966fe90bb2f578d96097bed628360af76e738f713a1d3b
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ampicilina+sulbactam+bula+pdf'. Additionally, a PDF SEO link farm heuristic indicates the document is part of a larger infrastructure for distributing malicious PDFs. The document body, though heavily obfuscated, contains remnants of the URL and appears to be a lure for an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. The primary intent appears to be redirecting users to malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=ampicilina+sulbactam+bula+pdf
    • http://files.bonafidecatering.com/uploads/1/3/1/6/131606652/4a647.pdf
    • http://files.didsburyjuniors.com/uploads/1/3/2/6/132681824/maxipupamekep.pdf
    • http://files.visiblechurchgb.com/uploads/1/3/1/3/131381021/f2b47e124bac4.pdf
    • http://files.koshtex.com/uploads/1/3/1/6/131606822/378629.pdf
    • http://files.globalexplorertravel.com/uploads/1/3/1/3/131380591/dalemotitaz-pofutoge-fogisurafufe-togomesusupot.pdf
    • https://cdn.shopify.com/s/files/1/0440/4684/4054/files/70274039477.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/general_characteristics_of_phylum_echinodermata.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/8273818996.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/auditing_legislation_and_standards_2020_2nd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9187/7283/files/ziwigifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudusojixidotivage.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4968/files/widagutakekabog.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/venezeseri.pdf
    • https://cdn.shopify.com/s/files/1/0437/1431/4405/files/wuselosulajeli.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/vodebefumamuxexitutijak.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6133/files/nelifukut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/selavadusajedomexaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/10668876832.pdf
    • https://cdn.shopify.com/s/files/1/0434/8238/2502/files/32693762121.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_off00016cea.bin
e382e784c313108e47aa3cd7e687554233eaf7d402e39a6a51932f3fc455f38d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CEA 5332 bytes
font_01_sfnt_off00017ef9.bin
c8b61003b0d4129ebdc5a557f85cfbf6265fd3a1ccaa1518b066c91f6304ff19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17EF9 17708 bytes
font_02_sfnt_off0001b563.bin
093ae7a69d19df335f57ecf9dce9beca2e3ffe669117e1d3cc05cb486a9df350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B563 16268 bytes

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