Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ce184e0640879d…

MALICIOUS

PDF

127.4 KB Created: 2020-08-06 21:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bf9b548942d92ff1f91779d67907b71 SHA-1: b981543d4e900bb8f16a27bfe02adb19fe7eec39 SHA-256: 84ce184e0640879de994463405da2dfcbe80e7b8b669898f4d6e75748d7243d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=pentecostal+and+charismatic+movement+in+ghana+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent.

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.ru/pify?keyword=pentecostal+and+charismatic+movement+in+ghana+pdf
    • http://files.cockburnarchitecture.co.uk/uploads/1/3/1/4/131453302/48d552374b.pdf
    • http://files.poultneyvtrotary.com/uploads/1/3/0/7/130775727/f08d3c935c4a654.pdf
    • http://files.atouchofclaas.net/uploads/1/3/0/7/130775362/tubejuza_xujiwo_piwimusajimiwum.pdf
    • http://files.prowashmyrtlebeach.com/uploads/1/3/0/8/130874526/c7a22.pdf
    • http://files.tuxcattreasures.com/uploads/1/3/1/4/131453194/2373047.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1800/2343/files/3151058219.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/14815809362.pdf
    • https://cdn.shopify.com/s/files/1/0440/5703/4902/files/vakaradiboloneku.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2644/files/kavozila.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/bsc_agriculture_entrance_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/80481534464.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/artist_bio_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/fugiximi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/73520272610.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8975/files/examples_of_miscommunication.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/42121507387.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ac44.bin
ceac9ddf2cb80a1ab96ed2c6e404831bf3b22d4f62f7e0d4692c04785fbb2408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC44 5420 bytes
font_01_sfnt_off0001be81.bin
2394c69546b7bc496363f155f60dffa7a027e43e4dfc96441c82d22976ecca6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE81 10192 bytes
font_02_sfnt_off0001e15f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E15F 4324 bytes

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