Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa27b5fd5186acf6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-17 16:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a1125a27cadd7db650addc9f08acce6 SHA-1: ef829229ea11ece998df526dd536404461dcb832 SHA-256: aa27b5fd5186acf63e9799ff4cf3ee892bf8ff93020275e31f8952ac6adb0a25
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document body itself contains text suggesting it is a lure for a free e-book, specifically mentioning 'Caballo de troya pdf saga completa gratis'. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm designed to obscure the malicious redirector.

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.cc/pify?keyword=caballo+de+troya+pdf+saga+completa+gratis
    • http://files.islavistabicycles.net/uploads/1/3/1/1/131163740/bbf9f01f3.pdf
    • http://pipafarow.toubabasket.com/uploads/1/3/0/8/130813765/kobadowek-zaxemit-gusadimu-pamalixexup.pdf
    • http://guzozefu.solesuperior.com/uploads/1/3/1/8/131856554/jefapemisik.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/97428145163.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/27877352065.pdf
    • https://cdn.shopify.com/s/files/1/0451/0426/7427/files/pawotoger.pdf
    • https://cdn.shopify.com/s/files/1/0430/6360/7445/files/60619409078.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/57233657534.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/tibafadotafivage.pdf
    • https://cdn.shopify.com/s/files/1/0438/0069/0848/files/57982442695.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/aambala_song_lyrics_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/11050815633.pdf
    • https://cdn.shopify.com/s/files/1/0435/0240/3750/files/port_forwarding_arris.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_off00005cac.bin
811cb736c33cce34c7f67741fc1b8e4a57a1467df6adfa1e47dc2553295078b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAC 5420 bytes
font_01_sfnt_off00006f2a.bin
785ba5c8ceb9987f10ddd7e2f209d012480b010d11fcdab1ca95c63b1dad93cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 11736 bytes
font_02_sfnt_off00009596.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9596 4324 bytes

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