Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b7a45eeac5735a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 04:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 189ead81cca564e874bd524b3ac76b61 SHA-1: ad06768a11e67d7650afd20bb0a0623ce75e5983 SHA-256: 11b7a45eeac5735a6db3a73898dcbeac92d48f2c8ed3c821993d18ffc0f48806
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. Another critical heuristic identified a large external PDF link farm, suggesting a tactic to distribute or host malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack, likely delivered as an attachment.

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.cc/pify?keyword=full+mouth+series+guidelines In PDF document text
    • http://files.tswb-apa.net/uploads/1/3/2/6/132683328/vorikigekamowabi.pdfIn PDF document text
    • http://files.lakeeffectservices.com/uploads/1/3/0/8/130873728/52f1168398e8f.pdfIn PDF document text
    • http://files.oversealgala.org/uploads/1/3/1/4/131407968/wukani.pdfIn PDF document text
    • http://files.avsevents.co.uk/uploads/1/3/0/7/130739764/7325391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/beginner_workout_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/jofedoloj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/xinudunumari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4224/9631/files/35177405872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/jajiwitepupawun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/bandura_s_theory_of_self_efficacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/types_of_protected_areas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/mozunepozavugizoritasasop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/88340601725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/answering_phone_call_at_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7543/5677/files/4539356906.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715d.bin
6c2ccd651164a54a953eb6f5b360fd0012359aefaa0ddcd73e73473c00c62ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 4984 bytes
font_01_sfnt_off0000822a.bin
05066a5d93fdffaf30b9aee95ab2ecb118995a399c7504f5c27402b82bc5fd37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822A 10388 bytes

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