Malicious PDF — malware analysis report

Static analysis result for SHA-256 0166d086e8fff96c…

MALICIOUS

PDF

49.3 KB Created: 2020-08-20 05:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0771d29b052c3b6f2987f89514c3d59 SHA-1: f3d5a5dfc1124c36077af5265a25ab64ef51ae00 SHA-256: 0166d086e8fff96cdde22c5cbfadb42c3d1a23cc686c26cc1877952dadb11628
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though obfuscated, contains text suggesting it is an 'expenses spreadsheet template', likely a lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=expenses+spreadsheet+template+uk, which is designed to redirect users to further malicious content.

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=expenses+spreadsheet+template+uk
    • http://files.facetheclutter.com/uploads/1/3/1/3/131379544/f38d6bb8e5.pdf
    • http://files.weindogearth.com/uploads/1/3/1/1/131163841/dowanopivulija_lerafuti_sobak_kemomazomu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/mibanigubabolovija.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/gosezanowizesuzowezumezef.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/white_horse_tylor_swift_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/sakaradaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/9404801396.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/ghatna_chakra_gs_book_for_ssc_in_english_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/2013_ford_escape_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/microscpio_ptico_e_electrnico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajomuxufukurojudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/cours_d_anglais_niveau_bac.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/59906074307.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7341/files/30055327768.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/qaseeda_burda_shareef_dawateislami.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000812a.bin
f9fce8814cb1dcdb101b8c88591d02d988562715648870a7001d6493a8b8eab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812A 5288 bytes
font_01_sfnt_off000092f1.bin
6b4c781e3e5d4d26328ebaabc7a21d55e6d90e324fc7dcbcafeb5f912c66c63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F1 10956 bytes

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