Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4701ad793c1b57…

MALICIOUS

PDF

37.7 KB Created: 2020-08-18 21:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97987cb5bcd9c5654e7492b406ccfe38 SHA-1: f67c24f24c95e8b6ab035f154382605fa2753da9 SHA-256: db4701ad793c1b5747cf82695fff3bb431bb4a9f733b916030fe1fb2b08f2c4c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs, a common tactic for SEO poisoning and link farming. One critical heuristic identified a link to a known malicious redirector, https://ttraff.com/pify?keyword=amigurumi+treasures+book+pdf, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains this URL and other PDF links, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=amigurumi+treasures+book+pdf
    • http://rigifaw.saferoptions.org/uploads/1/3/2/6/132682076/jedukemogap_jizebimagozi_jitebabovuxif.pdf
    • http://files.primamusiceducators.com/uploads/1/3/0/7/130738564/jekebisin.pdf
    • http://files.michaelcozzaglass.com/uploads/1/3/0/8/130813037/xodepipo_notevotilokiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/radatake.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/brittany_renner_judge_this_cover_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/windows_xp_oem_iso.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/verupuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/82055024982.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/balistica_forense_livro.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2284/files/apec_2020_agenda.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/vufafaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/68636606622.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_off000047c4.bin
80243149e8a608e7ff0cc0959b4e99f6dacf3c50b3652ab41396236c92d92211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C4 5300 bytes
font_01_sfnt_off000059c3.bin
8569c104dc4fb3e8e241d40c907d853a9b45e3af09504e7fad8cfc0c6373a5e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C3 9952 bytes
font_02_sfnt_off00007be1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE1 4324 bytes

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