Malicious PDF — malware analysis report

Static analysis result for SHA-256 735c1d954eb6ad42…

MALICIOUS

PDF

45.6 KB Created: 2020-08-26 12:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86709d03a51e15c45d433874c11456ee SHA-1: 4124bd517197e01d711cfb48cd0bf3a66c90d664 SHA-256: 735c1d954eb6ad4252e3571bc087bbbf7bb3c2711914d27c2cb94deed2a4d30a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially obfuscated, includes the title 'The heritage of shannara' and the authoring application 'wkhtmltopdf', suggesting a lure to a potentially malicious site. The presence of numerous links, many pointing to Shopify domains, indicates a link farm or SEO manipulation tactic to disguise malicious activity.

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.link/pify?keyword=the+heritage+of+shannara
    • http://motodu.misswardmusic.com/uploads/1/3/1/4/131438869/temagipevudud-kajut-midaduribuleduf-gelig.pdf
    • http://fosura.kirstenphotos.com/uploads/1/3/0/9/130969204/d96c85b7db404.pdf
    • http://daweda.vividconnections.co.uk/uploads/1/3/0/7/130775350/279e07e.pdf
    • http://bavobuwa.greenbuilders.co.nz/uploads/1/3/0/8/130874254/xibuvikomusemanofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/excel_journal_entry_template_for_quickbooks.pdf
    • https://cdn.shopify.com/s/files/1/0438/3031/3122/files/nawob.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/wifajimipifedimegimepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/66999958279.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/32078309333.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/31132959751.pdf
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/51052908997.pdf
    • https://cdn.shopify.com/s/files/1/0433/5337/4874/files/budget_2020_income_tax_slab.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/416351594.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/lodafotufufomo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000694b.bin
b95060eaf57056d83e79ba037f54de525cd9d66836bd3dd8b0a728e12e46d268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694B 4736 bytes
font_01_sfnt_off00007957.bin
30e6523aa285d0506dcdf04b8a552ca7efd84606dc907d74721a3ede0a8fb41d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7957 10040 bytes
font_02_sfnt_off00009ba8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA8 4324 bytes

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