Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b56d10dc6acc39…

MALICIOUS

PDF

47.0 KB Created: 2020-07-09 08:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8d4a25219f55765c3ae18378859b903 SHA-1: ea2593dd51d8dfaee9cc57f47a8335b40a58a548 SHA-256: 03b56d10dc6acc395c96be31874d743d5bb95afbe674289feba43a5af2ea6264
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, directing to various external sites. One of these links, 'https://ttraff.com/wb?keyword=personal%20effectiveness%20in%20gender%20communication%20pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains similar URLs, suggesting the primary purpose is to redirect 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.com/wb?keyword=personal%20effectiveness%20in%20gender%20communication%20pdf
    • http://files.dartendistrict.com/uploads/1/3/1/8/131856381/jarukid.pdf
    • http://files.vmagchicago.com/uploads/1/3/1/6/131607010/patadefutugo-lobamanakad.pdf
    • http://files.helptakeaction.com/uploads/1/3/2/6/132681938/3009213.pdf
    • http://files.eugenemontgomery.com/uploads/1/3/1/4/131438766/zesolabugilobe.pdf
    • http://files.lemonthistory.org/uploads/1/3/0/9/130969990/bumafu_gadurikuv.pdf
    • http://files.fortsmithconcrete.com/uploads/1/3/2/7/132740547/8022016.pdf
    • http://files.monfortestatesdacula.com/uploads/1/3/2/6/132681002/226bb98.pdf
    • http://files.activewavesolutions.com/uploads/1/3/2/7/132741181/rigena.pdf
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdf
    • http://files.traditionalmagic.com/uploads/1/3/0/9/130969758/jonapefori-bevikafoxitu.pdf
    • http://files.theyogaschoolny.com/uploads/1/3/0/7/130775942/668541.pdf
    • http://files.lhifranchise.com/uploads/1/3/1/6/131637092/riwus-ragosubevopi-zabemunavok-fumibebalodalaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://datewaxota.files.wordpress.com/2020/06/1263368535.pdf
    • https://zejefasa.files.wordpress.com/2020/06/38193528888.pdf
    • https://badodisorel.files.wordpress.com/2020/06/dugimegupuverikufevadexi.pdf
    • https://jewufufa701292410.files.wordpress.com/2020/06/xugopatizan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.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_off000077fd.bin
b4d2be3b7d113008bd1a34ef269f7611bd600eb80e611f64409d7a348ef96654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FD 5420 bytes
font_01_sfnt_off00008a4f.bin
3c65475aad01b44c0bd38a3cc12e4ef52a1c5333787968dc0d2a8d324c3e481e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4F 10520 bytes

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