Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a0eb30593cf28a…

MALICIOUS

PDF

33.7 KB Created: 2020-08-02 17:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 784fc8813422d05d726ea3b29f50a88f SHA-1: 9a6530ee54ea60035e67c3310aa61e16f32aad6a SHA-256: 88a0eb30593cf28ab982b9f8f93fbf5143eab53b267c1cb8f17427761b81c8bc
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/pify?keyword=legend+of+zelda+gba+rom, points to known malicious redirector infrastructure. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious activity appears to be the redirection to external, potentially harmful, URLs.

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.ru/pify?keyword=legend+of+zelda+gba+rom
    • http://files.marhamchurch-pc.gov.uk/uploads/1/3/0/8/130873718/b383307e601c.pdf
    • http://files.christiancounselorcooperative.com/uploads/1/3/1/4/131411539/786efb8eceba4.pdf
    • http://files.summerfoxart.com/uploads/1/3/1/8/131856987/burujekatexot_bojalotibab_sepevusosa.pdf
    • http://files.bellafiorelagottos.com/uploads/1/3/0/7/130776542/3dec942c4ab251.pdf
    • http://files.robbyersuk.com/uploads/1/3/1/4/131438330/9076359.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/22908270692.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8885/files/doxusebozuvovavaxesibu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6357/4682/files/reading_comprehension_elementary.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1416/files/the_garden_of_sinners.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/81190165478.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/fulegotuvakujuxekufakesom.pdf
    • https://cdn.shopify.com/s/files/1/0428/6539/3820/files/55488559456.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/jaxisilirokopefez.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9799/files/78004838354.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/98590434153.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/luditikuvokeji.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_off00004717.bin
7f47c781ed20e0738403012200edca967c040d73231e9df209d5b2b483114229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4717 5180 bytes
font_01_sfnt_off000058ae.bin
d0a399f9e56eec605ff08747593d3793804e6fdebbbc96f8aa03e8a6d26e33d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AE 9704 bytes

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