Malicious PDF — malware analysis report

Static analysis result for SHA-256 6756df0d55260023…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 03:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 965638086402828676b24f83b061e674 SHA-1: 8ed05a819442c49c7fbcce77c593fadc9bb4619e SHA-256: 6756df0d5526002373b1285d1a0733acd4c10432e856dfb2b1ae0e9f0e376036
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed to generate traffic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=robotics+and+automation+pdf'. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. The ML classifier also flagged this PDF with high confidence.

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=robotics+and+automation+pdf
    • http://files.dry4u.com/uploads/1/3/1/3/131380688/dujupuxeb.pdf
    • http://files.powerwindowparts.net/uploads/1/3/1/3/131379803/bfb89a563fbc.pdf
    • http://fusava.sandiego173rdairborne.org/uploads/1/3/2/8/132814930/1526913.pdf
    • http://files.chuckpisa.com/uploads/1/3/0/7/130739415/bosepa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/walokakigamumiritifedivaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1613/files/alimentos_permitidos_para_diabeticos_tipo_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/convertir_de_a_word_editable_sin_perder_formato.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/va_form_10-_7959c.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/59715870218.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/45220977837.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/raxojafopawadumab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/babuzobif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9826/0124/files/zugekefinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/are_entrepreneurs_born_or_made_discuss.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/6164356761.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/88302610077.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/59665545070.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_off00007f59.bin
658a3240d0c381c1e282fc67a1d2365ceca084facea6185b2a8a083acbff1a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 5320 bytes
font_01_sfnt_off00009157.bin
9bd4df004730b48fafe810d446317535ec7c271ab39dfd5605281dc761032faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9157 10452 bytes

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