Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d2023bda43884c…

MALICIOUS

PDF

40.7 KB Created: 2020-10-27 07:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff1fdada232eb71355ee263d18aa29fa SHA-1: 7ea8c983461126e0128859b763aae762e0bc84be SHA-256: 06d2023bda43884cf64357ca89d30e741bbaf475f4179c4b866caadcb0b0b0d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL.

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.club/123?keyword=mitosis+worksheet+and+diagram+identification+answers
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/875387.pdf
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/bavudijodebijoxeb.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/cf3fc542d3ad.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/62be3edfc1.pdf
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/bevizopalakelipavad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0266/9261/6372/files/how_to_tie_a_reef_knot_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0481/5755/6903/files/polypipe_room_thermostat_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/93447205992.pdf
    • https://uploads.strikinglycdn.com/files/736577af-d511-447c-9fd8-50c44f9de903/73192259113.pdf
    • https://uploads.strikinglycdn.com/files/5a33555d-75f2-4ad9-ae1b-238609630a02/96604616499.pdf
    • https://uploads.strikinglycdn.com/files/9fb9a41b-842e-459d-ac8c-e3139e011c05/jidutesesewawuza.pdf
    • https://uploads.strikinglycdn.com/files/ea788503-bd63-47cd-84f9-5a8a9919bdae/2525021908.pdf
    • https://uploads.strikinglycdn.com/files/009c7b2d-f078-487d-882b-ee4660f8b3f6/95610545625.pdf
    • https://uploads.strikinglycdn.com/files/9d174f70-2ccf-48e5-8eab-e0e787849815/digital_marketing_agency_business_pl.pdf
    • https://uploads.strikinglycdn.com/files/e5ac36ae-1b1b-4e2f-9503-7383ddac13ca/47174768072.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/apostrophe_figurative_language.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/saximopavetupidaxesuw.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_off00005db4.bin
3556c047f973bc2391837b7ec1b6ebf2c3a6edd74ee810c41eba309e6377a653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 5564 bytes
font_01_sfnt_off0000708e.bin
121b9d83bc46b39e26ef7da1ae82cd57d04f4ed38b134babaee2427cfce3ef35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 10944 bytes

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