Malicious PDF — malware analysis report

Static analysis result for SHA-256 191dc4c2dc2f0585…

MALICIOUS

PDF

47.1 KB Created: 2020-09-12 20:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f66724e429c83d5d994988facb196e32 SHA-1: 7fdbcbde2876bb6ca85553294e9c7e2953fbe5d7 SHA-256: 191dc4c2dc2f058500320517c72914e359485669375cf30d8bce73cb2cfc21d0
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.me/wix?keyword=x3+reunion+guide, which is flagged as malicious. This suggests the document's primary purpose is to act as a lure, directing users to potentially harmful 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.me/wix?keyword=x3+reunion+guide
    • http://files.stayinplace.org/uploads/1/3/0/9/130969904/8816889.pdf
    • http://jaweboja.stainedglassandwire.com/uploads/1/3/1/4/131452976/1710355.pdf
    • http://files.headstrongequestrian.com/uploads/1/3/1/8/131856330/427beb8a7731.pdf
    • http://xefopu.charlenemosley.com/uploads/1/3/1/4/131438044/naxililer_remepavukuvate_jimigojovuke.pdf
    • http://weboka.storiesbyeli.com/uploads/1/3/0/7/130738837/nevibu_zosidigifajis_peguz_nugoviwerusawuk.pdf
    • http://files.grundmeyerleadersearch.com/uploads/1/3/1/6/131636990/sifixoj_jutixepipi_bevasagipaxuja_sivosukisozi.pdf
    • http://files.tommybarrettbroadcasting.com/uploads/1/3/2/6/132695730/6334501.pdf
    • http://xogixem.torreymun.org/uploads/1/3/1/8/131871721/wagodiz.pdf
    • http://files.amphionpercussion.com/uploads/1/3/2/6/132681464/pevikawejof-koroviposof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8594/files/wahl_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2898/files/4445339284.pdf
    • https://cdn.shopify.com/s/files/1/0441/0179/5992/files/bijadozi.pdf
    • https://static.usrfiles.com/ugd/16879a_7dd4ee361e2049618ef864e21b11ffc5.pdf
    • https://static.usrfiles.com/ugd/3d7af5_929ae6382e0842e18854cd043e520c53.pdf
    • https://static.usrfiles.com/ugd/451a43_ef2f61a65fb047dbbaf7bc1483e76956.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_b253badd28054fba91b073ba266900c9.pdf
    • https://static.usrfiles.com/ugd/938c70_5a57fe62e8c54602bb9916ef015c9e42.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072fb.bin
968dd97fff871c74b221b42e0ea5cb30aee22574a1123d69e52d62b3f3d74099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FB 4716 bytes
font_01_sfnt_off00008313.bin
c39ad1b83c9a0f328e25326c6ccf842789994c9e467cab394f159043fc9a6a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8313 13964 bytes

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