Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0186ef64a5cdf97…

MALICIOUS

PDF

85.7 KB Created: 2020-08-23 00:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 261352d6db715529426c38cc92e8d076 SHA-1: 209e83311cfc2de23071ccb2012cc4b6575ef9e7 SHA-256: d0186ef64a5cdf97d62a029f27c0cdf47abe7dcfac411686862912c5aaddd62d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=manual+sencico+autocad'. This indicates an attempt to direct the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain the same URL, reinforcing the 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=manual+sencico+autocad
    • http://gonis.amyrosemoore.com/uploads/1/3/0/8/130813612/9433353.pdf
    • http://rikasi.teddingtonbowlsclub.org/uploads/1/3/1/6/131606289/sitimux-kulikufew-motimebixerub-sorowowipak.pdf
    • http://wexoka.arkansascloggingcouncil.com/uploads/1/3/0/7/130776819/kezademex-wikuwiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/viriruvepimodatan.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/24334171561.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/takutixomiwejorikad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/xewizukes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5829/0070/files/zusalipumirolewagosituge.pdf
    • https://cdn.shopify.com/s/files/1/0433/4066/0891/files/jarerazigidofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/weber_carburetors_tuning.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/82729659826.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/75250394018.pdf
    • https://cdn.shopify.com/s/files/1/0438/2041/7181/files/we_re_going_to_be_friends_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/tosudofewakonototakixum.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/371402482.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/21176433807.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_off000107d2.bin
fd700f4eef7079aa3dded5d8b70559135b9a459a58680fa63fd4a5b22c6e2d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 4724 bytes
font_01_sfnt_off000117ed.bin
e99e0ec97877ac76d1b8d096bad34e89715e9768f09479983e0e53bd274e4401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117ED 10488 bytes
font_02_sfnt_off00013bbd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBD 4324 bytes

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