Malicious PDF — malware analysis report

Static analysis result for SHA-256 70df6b652bb22163…

MALICIOUS

PDF

44.1 KB Created: 2020-08-21 06:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd2e1854b107ec619808f42743330569 SHA-1: 3d2ce7d395d55e46ee25cb05600716dd0a7d61ba SHA-256: 70df6b652bb2216367ea1954d62a57afc016e0b353727c5ea1723690592591d4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The document body text, though heavily obfuscated, includes the URL 'https://ttraff.ru/pify?keyword=inventory+management+system+website+templates+free', suggesting a lure to a phishing or scam page. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further 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.ru/pify?keyword=inventory+management+system+website+templates+free
    • http://files.yamayasgift.com/uploads/1/3/2/6/132695519/f6b055.pdf
    • http://kifemis.cancercoloring.com/uploads/1/3/1/0/131070450/380a04d2c66c5bc.pdf
    • http://files.twocities.ca/uploads/1/3/0/7/130775998/34dc27646a9054.pdf
    • http://files.caseymcphedran.com/uploads/1/3/1/4/131453302/0e24e066b0c3f.pdf
    • http://files.constitutionpartyms.com/uploads/1/3/2/3/132302963/kuzazetegenedew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/30479774557.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/gexowidegiwawaliwoli.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/ridolatovewibijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/562936969.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/ccna_final_exam_answers_2015.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/partituras_bossa_nova_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/aryavarta_chronicles_govinda.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/b_s_t_c_exam_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/nosokojava.pdf
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/redufadux.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_off00006d33.bin
b4c9498be2ee08b690572d740d7e7c23cb3732d0c71eb8de50d3d41ca8b17b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D33 5552 bytes
font_01_sfnt_off00008017.bin
0d76f53193d152ccbe9a8fc898088ab514bee84bf48befa732a3efd75874551e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 10228 bytes

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