Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f7648aeded3118…

MALICIOUS

PDF

32.7 KB Created: 2020-11-02 23:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 73dbd9cbad123330be54ca2293414bee SHA-1: 1e46e60e4b077b15034e31c2268a7a9e2404a1d4 SHA-256: 29f7648aeded3118fae9a886f06977f1fafabe2ccf37f2b12cd9c6388a307725
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary malicious URL, https://gettraff.ru/strik?keyword=disfruto+carla+morrison+letra, is likely used to direct users to further malicious content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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://gettraff.ru/strik?keyword=disfruto+carla+morrison+letra In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f9741ec8b07f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f8a70ca573df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f93b99cbd9d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5f915c2cb8ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f87ddf28a4fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f96de368fe2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/briggs_stratton_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/supreme_commander_forged_alliance_mods_in_campaign.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/romeo_and_juliet_figurative_language_act_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1418/8967/files/42657771330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43cba0bb-0ed3-4116-bc32-53ae79196628/what_is_metafiction_in_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/bakteri_acetobacter_xylinum.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/jatuz.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/libro_budismo_para_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/hai_hai_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/berixepiton.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_off0000462e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x462E 5024 bytes
SHA-256: 57397bebc76c079ee7a2601396dd5dd50e597a9022dc6e17d1122bd0f3930ae6
font_01_sfnt_off00005737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 9000 bytes
SHA-256: cc3749e4a1d62e9fb3fecb1443d98abceb8ec0f3a77ed3c2bfca01d711f8b7fe

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