Malicious PDF — malware analysis report

Static analysis result for SHA-256 89310f91c7605c0d…

MALICIOUS

PDF

44.3 KB Created: 2020-09-10 00:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856899606bd22c4cbba5494d43503637 SHA-1: 1e18e90a1cb93d8dd47ae1ef8b1f703798894c22 SHA-256: 89310f91c7605c0d1cb76d6bcdc3c0a701e74b014cc0b5a4aeeb8520e41f8f6b
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure for free downloads, specifically mentioning 'Principios de quimica atkins pdf descargar gratis'. The PDF_SEO_LINK_FARM heuristic further suggests a large number of external links, many pointing to Shopify, likely for SEO manipulation to increase visibility of the malicious content.

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.me/pify?keyword=principios+de+quimica+atkins+pdf+descargar+gratis
    • https://cdn.shopify.com/s/files/1/0433/8017/9107/files/causes_of_deforestation.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/74993307653.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/fofejinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/jezirawibavexanojixale.pdf
    • https://static.usrfiles.com/ugd/31bf02_fa053a640899465ab2fd96a2ee618174.pdf
    • https://static.usrfiles.com/ugd/bb13a2_1a25f014a4844fcab024f1729ecb45f6.pdf
    • https://static.usrfiles.com/ugd/ba3095_7dd694157e0e412ca7cd6fcc8a3d3a38.pdf
    • https://static.usrfiles.com/ugd/b8c837_0520b94c0f5e4d7682e4512e462c7469.pdf
    • https://static.usrfiles.com/ugd/b8c837_784bfa14201d4a65a47962ecca116fc2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4846/8631/files/tijirawapomozeriwasakate.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5227/files/moral_dilemmas_in_healthcare_informatics.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_off00005d67.bin
1f9bba7ad3623dfcd4985717fcb980f0aac70ec13962ef45ad3cb82d4ed2753e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 5516 bytes
font_01_sfnt_off00007002.bin
17a0c15eddeb53c80bd6f85579341d81c97d52d4803e1f520630204353aa4a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 11172 bytes
font_02_sfnt_off00009449.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9449 4324 bytes

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