Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c061a24edfaff93…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 04:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d09d1d5528e2ce384624cf37074c01 SHA-1: b00abaad8c452cfac156d92cf7dc2492b16b3a73 SHA-256: 6c061a24edfaff93ac01435f1bf5bcc34eb93b12dc54038b8aa8391cd661f228
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one critical heuristic identifying it as a redirector to malicious infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=autocad+electrical+tutorial+pdf' is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains references to tutorial content, suggesting a lure.

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=autocad+electrical+tutorial+pdf
    • http://files.theirisproject.net/uploads/1/3/2/3/132302998/6367937.pdf
    • http://files.itshoursunlimited.com/uploads/1/3/2/6/132695352/wesomolofibed-lirifa-sukowuxamodo-regetefiseza.pdf
    • http://files.imsarc.net/uploads/1/3/2/7/132740798/2029198.pdf
    • http://mamogot.angkorvetclinic.com/uploads/1/3/1/8/131857315/e3a1d0f574e21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2661/9300/files/download_photobucket_album.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/movar.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/mejizovedavaduvokovufumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/75840208051.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/while_statement_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/vevawotibututa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/dos_mundos.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/vilovipivusidozafopidano.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/52000746635.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/23331075814.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/neruzowufako.pdf
    • https://cdn.shopify.com/s/files/1/0438/5118/6336/files/88960173796.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_off0000663d.bin
387ec503c2003956336ed0389198ace57c41662dc06bfa7c89434979c0102847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 4960 bytes
font_01_sfnt_off00007730.bin
317ea7567da852aa027fa340c70326b36a8f8e93def2e80c5d89e96cc821b477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7730 9864 bytes

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