Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d3e1af57b45feb…

MALICIOUS

PDF

52.9 KB Created: 2020-08-06 15:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748b8d947ea0215396b33a215d290529 SHA-1: f16405d6eb99f0f315cb0d5763b60919555bc3bf SHA-256: 25d3e1af57b45feb72f4e1a515db7783732efd60776592f0e4a885b2feb7fc02
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one specifically pointing to a known malicious redirector. This suggests the document is designed to lure users to malicious sites, potentially for phishing or malware distribution. The presence of a link farm heuristic further supports the idea that the document's primary purpose is to host a large number of external links.

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=el+bestiario+arreola+pdf
    • http://files.lionstoothdesigns.com/uploads/1/3/0/8/130814007/mizobev.pdf
    • http://zawigeg.paultophamphotography.org/uploads/1/3/1/8/131857631/4113230.pdf
    • http://files.southernaz.usafachapters.org/uploads/1/3/1/4/131438477/5672379.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7051/files/paxajemoxisibofaraxapow.pdf
    • https://cdn.shopify.com/s/files/1/0449/9534/6590/files/brodski_dnevnik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/31504496744.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/zovagadogaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/52868586390.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/collaborative_learning_strategies_in_the_classroom.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/modern_high_end_valve_amplifiers_based_on_toroidal_output_transformers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9246/6080/files/49248346655.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/66815918181.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/7901598747.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fc9.bin
5711f2a0b4ccbbf7fff3a10d99675acee3b68e12f5355f5df99a9012f1d2c329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC9 5132 bytes
font_01_sfnt_off0000a145.bin
e2c4bd1457917be21feaeb136591529cb4d743a89f1e538738cbc126908a89bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA145 11128 bytes

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