Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b4b23634dcf0a2…

MALICIOUS

PDF

58.3 KB Created: 2020-08-12 13:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fbc7cc406eb6d14d8694aeb182d1670 SHA-1: c7a10547748914b5edf9efb91bdf42e7c062d0b0 SHA-256: 87b4b23634dcf0a25f95dbafc62796c609c9ba25a2bec7526d513bd40159def3
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.com/pify?keyword=community+ecology+pdf
    • http://kujaf.outsideinstables.com/uploads/1/3/1/4/131482975/c6d9b70.pdf
    • http://files.thediscoverypoint.com/uploads/1/3/2/6/132682868/5761160.pdf
    • http://bepomoge.sandstonegoats.com/uploads/1/3/1/3/131380600/dijasobawive.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/singleton_design_pattern_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3910/files/migitogowetemilanon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/xiwubomidafo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/handbook_of_blood_pressure_measurement.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/english_reading_practice_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/tusomexirebuleloparozexav.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/takuraburowupex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/bankers_adda_current_affairs_capsule.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/woluviditamawaxafuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/35624302176.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/7226773480.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_off0000a8a8.bin
2af77c00dcca0ef47e8358fb2eeb35df79c590396c74e1d6b4112ca0537254e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A8 4996 bytes
font_01_sfnt_off0000b9a9.bin
f568383994be9b95c890969cdd8c647d0385fa45a9b2b61b77f986f7e80ffd78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A9 10224 bytes

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