Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abb8bcdfc5c45f4…

MALICIOUS

PDF

41.2 KB Created: 2020-08-07 13:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c285ea3ade19d4b3a2274ba7c60242bb SHA-1: d8f00c47f9225e2b58213fc388157039a156a8f8 SHA-256: 8abb8bcdfc5c45f446c4570e569998727c39b430a408b46a15da748365c4cf1e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=aristotle+book+politics+pdf', which is also listed as a malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to attract search engine traffic and potentially hide malicious links among benign ones. The primary malicious URL is the entry point for the attack.

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.cc/pify?keyword=aristotle+book+politics+pdf
    • http://files.sueannecelebrant.com/uploads/1/3/1/3/131379402/8511316.pdf
    • http://files.radcliffchristianchurch.com/uploads/1/3/0/8/130813979/jagoka-sirerijuxobu.pdf
    • http://files.asapbwh.org/uploads/1/3/0/8/130874254/pezanipifugosiz.pdf
    • http://fapagabu.reneeregan.com/uploads/1/3/0/8/130874359/3089473.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/levaxaweduvarixolida.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/bixudosagozeled.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/gas_turbine_theory_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/32213614487.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdf
    • https://cdn.shopify.com/s/files/1/0448/2852/4701/files/ancient_words_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6521/3089/files/77887877065.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/icy_veins_resto_druid.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/95997481111.pdf
    • https://cdn.shopify.com/s/files/1/0437/6110/7105/files/beating_the_street_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/nebegilepazawogadebogujar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/73327870890.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/50146780617.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/kegegurebudirewij.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_off000063f5.bin
0cc7f574949c8478c039f19a68cb51a2d98e0cef7357ceb3fc02c01ac9156a1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 5132 bytes
font_01_sfnt_off00007577.bin
da6588a7c6b46d743d5b96ed7b5646a6ddc34f077257071decc78d7bfe343fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 10080 bytes