Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2a0efa27237f75…

MALICIOUS

PDF

109.3 KB Created: 2020-10-25 17:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0f6985b076de4dc25e66f535be96b103 SHA-1: 9ca5f5982fb12d3b5a892ea3ec24df1d1971b717 SHA-256: ad2a0efa27237f75ee55c8009a912ed50f217126849e3b65c31777e836021624
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with keywords related to a medication package insert. The document body, though heavily obfuscated, also contains this URL. The presence of numerous other links to PDF files hosted on various platforms suggests a link farm or SEO poisoning attempt to mask the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=clozapine+package+insert+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f8b4c4779ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f8e2114d2a1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_5f9375c32f030.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.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/1/0438/4161/8082/files/tratamiento_para_el_alcoholismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6680/9241/files/32293392492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/resurrection_high_school_chicago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3253a452-96ea-4545-a1d0-5a7654ed00e2/kupofanefutuvibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9100d8bc-f615-4e00-bf4b-b37ec8aa0f0e/2640002934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41cebbee-786e-45b0-aeb2-77e1dbc09042/58032712683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fe8437-0275-4cdd-8aac-45cb9d321f33/wulubibowarosebaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03507c5d-64ff-41ca-8b91-7648714c8e69/17330842735.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/los_ojos_verdes_gustavo_adolfo_becquer.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/15960902919.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wing_chun_fighting_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/xarafubewi.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/sofajufovudozafuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4593/7048/files/31100665481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6133/5995/files/unable_to_connect_to_3g_network_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1688/6678/files/torah_hebraico_portugues.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_off00016bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BAD 5344 bytes
SHA-256: 90cdf34033419634f9b9634f3229010889ee512a060ff0bd6c0862d1f9eb4fff
font_01_sfnt_off00017df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DF3 12488 bytes
SHA-256: 9a6c878b0ddb5cd2a9b1826ed2fec9b2205c3448be0037a1803fa41798be42a4

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