Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ccade99f4352ea…

MALICIOUS

PDF

36.0 KB Created: 2020-09-11 08:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6179a4e02aace982d11465e86a2fb71 SHA-1: 5a2eca0f47384cb32e07e418dfbd9168b5ef27b2 SHA-256: e1ccade99f4352ea62fdda6a38f8c2ff3ccaefd42fb3c32fcd9ed48b3e036e7f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, directing users to various external sites. One prominent link, https://ttraff.me/wix?keyword=missguided+body+mist+boots, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains some of the same URLs found in the heuristics.

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.me/wix?keyword=missguided+body+mist+boots
    • http://files.chfsrbija.org/uploads/1/3/1/3/131380158/zavajud_suxedes_mesof.pdf
    • http://files.connecticutghosthunter.com/uploads/1/3/1/0/131070398/9581459.pdf
    • http://munogowa.diamonddanceacademydancestudio.com/uploads/1/3/2/6/132695535/497bb82.pdf
    • http://suxas.brockportjunioreagles.com/uploads/1/3/1/4/131438216/4491076.pdf
    • http://bonifa.theworkwithtom.com/uploads/1/3/2/8/132814930/9269544.pdf
    • http://livom.stephaniecpassman.com/uploads/1/3/0/9/130969192/5976776.pdf
    • http://files.gibbsfinancialfitness.com/uploads/1/3/1/6/131637881/ketutuperi_bugivowiti.pdf
    • http://files.allensfork.org/uploads/1/3/1/6/131606128/puziwofosetun-juvapukubi-tojixurux-lexidisokow.pdf
    • http://vefosut.badgeraviators.org/uploads/1/3/0/8/130874474/0b633c830a0.pdf
    • http://files.sturgeonenglish.com/uploads/1/3/1/8/131871433/4094021.pdf
    • http://rojerox.businesseducationmsde.com/uploads/1/3/0/7/130739163/xozajagovevilosa.pdf
    • https://static.usrfiles.com/ugd/92ee2b_fe1c1059c4c04946a93fe421a4607aba.pdf
    • https://static.usrfiles.com/ugd/b5973a_3bedbe2e0b4e4a7c8e93b4e8575931b7.pdf
    • https://static.usrfiles.com/ugd/6908d7_0aa59e7687864e448b0490dba987e4bd.pdf
    • https://static.usrfiles.com/ugd/6a22cb_d61a3d2fb0a34c92b22a374ac33318d2.pdf
    • https://static.usrfiles.com/ugd/ab922d_5ad619e36a2a444e91b9bc7e1b359ff4.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_off00004619.bin
1d13b45f768bbeb4642855f9760987f564b3d160001e94779c8aa4322f30fc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4619 4832 bytes
font_01_sfnt_off0000569b.bin
8ff419fb1b26ed889fde75582caffd9bdb0660faa4b33ba024a3e2fd4f0ecd0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569B 9060 bytes
font_02_sfnt_off00007566.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7566 4324 bytes

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