Malicious PDF — malware analysis report

Static analysis result for SHA-256 144645a609459358…

MALICIOUS

PDF

45.0 KB Created: 2020-07-09 16:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c18896fd402ef509638cc2f118e91683 SHA-1: b936058de296055690abe1434e127c5b75947521 SHA-256: 144645a609459358ec000a93b4678af1c8fc3e8e31a13f15fc1f26a4f6a95a36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, masquerading as a manual, which is characteristic of a link farm designed to redirect users to potentially malicious websites. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL further supports this assessment. No scripts were extracted, but the document's structure and embedded URLs point to a social engineering attack.

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/wb?keyword=graco%20click%20connect%20stroller%20jogger%20manual
    • http://files.myelegantmarriage.com/uploads/1/3/1/6/131606819/lijukudamina.pdf
    • http://files.tylermoorefilms.com/uploads/1/3/1/0/131071056/29413422db.pdf
    • http://files.chefmanny.com/uploads/1/3/2/6/132682290/xulit.pdf
    • http://files.haywardfitnessfanatics.com/uploads/1/3/0/8/130874413/dugen.pdf
    • http://files.derekwarnerphotography.com/uploads/1/3/1/4/131437832/783d1b86.pdf
    • http://files.mhsamerican.com/uploads/1/3/2/7/132741571/7814391.pdf
    • http://files.stephanieheger.com/uploads/1/3/1/0/131070289/9317508.pdf
    • http://files.meriyaatra.net/uploads/1/3/2/7/132712174/xajitesabuzeko_bawenude_vizuvamutelo.pdf
    • http://files.dlfinancial.org/uploads/1/3/1/3/131379749/tobij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://doraxosonar.files.wordpress.com/2020/06/fududukatukakem.pdf
    • https://bijojaraduk.files.wordpress.com/2020/06/46079267376.pdf
    • https://miruziburofu.files.wordpress.com/2020/07/41510812707.pdf
    • https://doraxurewaz.files.wordpress.com/2020/06/71980755001.pdf
    • https://xesigifi.files.wordpress.com/2020/06/finos.pdf
    • https://tomozajip.files.wordpress.com/2020/06/33930909594.pdf
    • https://patepekugi.files.wordpress.com/2020/06/tulibulopeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1369814796.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.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_off0000633e.bin
29e99d27f5b0b0b71e6d3797c14b7f5fdac08edce58a5b8c27ffb7a675c31f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633E 5172 bytes
font_01_sfnt_off000074c8.bin
d843217cd79bc2fce6dc46c2c8f867a6e87e8b0dd891a9e4ca052fb2feb08a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C8 16232 bytes

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