Malicious PDF — malware analysis report

Static analysis result for SHA-256 71159ee76beddb90…

MALICIOUS

PDF

42.6 KB Created: 2020-08-04 05:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a4281731e35ce0bb8b2bb7d6d09d596 SHA-1: 41a747a343f839a1cafa061937b34fbed6d43da7 SHA-256: 71159ee76beddb90916070c578b28765e152a0e3907ff7749e3eb827c22502c0
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lead users to harmful content. The embedded link in the document body, 'https://ttraff.com/pify?keyword=butterfly+garden+book+pdf', is a primary indicator of this malicious redirection. The presence of numerous PDF links suggests a SEO-based lure to distribute 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.com/pify?keyword=butterfly+garden+book+pdf
    • http://files.gavanw.com/uploads/1/3/0/8/130874328/zinoturadi.pdf
    • http://files.mrpodmers.com/uploads/1/3/2/6/132681460/sitokasirukepaw-vizojadozi-gejapefisuz.pdf
    • http://wibawi.stpiusinprint.co.uk/uploads/1/3/1/3/131383297/bitowoxefoguf_bidijavabuvapiz.pdf
    • http://vapedimej.gmgtravel.com/uploads/1/3/1/4/131438453/dea8e1a595f5441.pdf
    • http://files.peldongaming.com/uploads/1/3/1/6/131606186/dopovowigik-wedeven-suvolopabo-zojugitag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/sefiwewovuwiso.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/71531887386.pdf
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/11550392421.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/xegax.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/cambridge_igcse_maths_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/89979920187.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/wovoripivexat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/tifawexedakoparijoxose.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/vabonasigivopaxisavozelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/rewibivi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/49220311272.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/51321900294.pdf
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/nosuvane.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_off000069fc.bin
90e5553ea6c50e2bb48f2403a2d716dae7b569b70cf1003182e4ed3ea1a1e14b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 5388 bytes
font_01_sfnt_off00007c69.bin
3a5c9e96ebe420fb36a1c1fca0b6d949a69e882225b9bce89d39906de0029044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C69 9720 bytes

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