Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bac32227a8ce9b3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-15 10:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee4946ddbb4c772088c1233a647289f4 SHA-1: adbc300678f383953444e7e9a7282ea4f6476a3d SHA-256: 3bac32227a8ce9b3f28481bda37217da7b1afccea7efe9b1d543003daa35941a
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body also contains the URL 'https://ttraff.cc/pify?keyword=cache+database+odbc+driver', which is likely used to obscure the true destination of the malicious payload. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly benign links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cache+database+odbc+driver
    • http://wobulan.pineycreekbastrop.com/uploads/1/3/0/8/130874233/vozilenivepib.pdf
    • http://files.onesource-ph.com/uploads/1/3/0/8/130813887/vinonige.pdf
    • http://davidufu.vegetarianwanderings.com/uploads/1/3/1/4/131407552/papugu.pdf
    • http://files.fraserlappin.com/uploads/1/3/1/3/131398366/996fb.pdf
    • http://files.judgescottdonaldson.com/uploads/1/3/0/9/130969510/zavasifoz-xisewajiwuman-rujedoniwova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9993/1295/files/bunavumenuzabimerakemawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/python_fit_gaussian.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/lasigikagudanosikoxoser.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/43677869183.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/pensum_de_administracion_de_empresas_uasd.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/seismic_vulnerability_of_structures.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/kojararasuvizosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/chrome_shelled_regios_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0440/7384/4888/files/jolet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7888/5280/files/accidental_death_of_an_anarchist_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/ronopidiluvimixanop.pdf
    • https://cdn.shopify.com/s/files/1/0435/1354/4863/files/lei_simples_nacional_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/watermark_pro_dc.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/77945410356.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_off0000698f.bin
92795b2beb248e2b84b77835ede91cd6aa91c428e64e758f28cbb9cd82d66354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698F 5100 bytes
font_01_sfnt_off00007ad9.bin
2bd6d0387606b2aa222d2ea1e53ddcc5f8c18dc1e5f787aa19ea86c28ad27a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 10740 bytes

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