Malicious PDF — malware analysis report

Static analysis result for SHA-256 c797880ddc77f6c5…

MALICIOUS

PDF

36.5 KB Created: 2020-10-31 04:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b48ddc3c56b81de2795f32db3a45f42 SHA-1: 06b07f7279b685f0dc6ade05e80b1ef04374109e SHA-256: c797880ddc77f6c556209dab23c9e1c98ef8d32948ae24494d731bc69b9078b3
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 a redirector service known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics, suggesting an attempt to lure the user to 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://cctraff.ru/pify?keyword=half+blind+dovetail+porter+cable+jig In 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/1/0486/2738/4488/files/45694334618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acea4776-e950-4bd1-a826-3a956e836d49/administracion_de_recursos_humanos_pearson_gary_dessler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0949/8045/files/rainbow_d4_se_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/rujanaribuximit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d850bb2-4897-43f2-8327-754fdcfbb58a/63453156980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156ee3ed-1f4c-4da1-8217-ece3f8b1ac20/89514162657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8930/0130/files/tyger_tyger_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0356/4995/files/make_your_own_neural_network_michael_taylor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7662/7863/files/65760965447.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/entrepreneurship_education_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/indian_head_massage_for_vertigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/pitigonuw.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_off000051a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A0 5380 bytes
SHA-256: 3c2021cae70c1c68b91f795bc1e1ad50f7273f574c85309fe1162f7dab08771a
font_01_sfnt_off00006408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 9772 bytes
SHA-256: f7a890d5ae5ed29f14d844f403846e0780008bba072cf5d246a6aee39b7a3ed2

Open this report in the interactive analyzer, or submit your own file for analysis.