Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd99948255cbf7e…

MALICIOUS

PDF

43.0 KB Created: 2020-10-16 00:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 37bfe4bf7a23cf2c36c283ee61f70075 SHA-1: 494933e43912ba953af886e842d87f26e899770a SHA-256: 3dd99948255cbf7e6c5684170ce94f56b76b03c2feaf5c9e2fa4bb1545cb4c82
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 benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to disguise malicious intent. The presence of a malicious redirector URL indicates an attempt to lead the user to a harmful site, likely for further exploitation or phishing.

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/123?keyword=tacticool+-+5v5+shooter+mod+apk+tomzpot In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f87122da608e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f88bc25ad3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f880f5304589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f88bba0d86f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f872aa5b427d.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/kesoxitowosur.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/38c349888bb2ad.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/nuxujulobi_mezugejodejamob_domizowi_gejok.pdfIn PDF document text
    • https://zavigajigufuf.weebly.com/uploads/1/3/1/6/131637719/jizitotevaw.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/1/0436/3524/5216/files/tuloto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1441/1672/files/ap_human_geography_2018_test_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8203/2298/files/fitgirl_repacks_site.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9276/1499/files/what_does_pilo_mean_in_medical_terms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/9552/3227/files/cave_diving_horror_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cd9aee-8ef5-4e54-9788-549af9f1b051/11371637135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1d730c-0f93-4b3a-b643-f3ed0e0f7325/xujaguvigugafojidelibek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36a40e9-373b-4141-a045-aa549cd9676b/dimajijupibivevonomixala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8096ce0d-daec-4eaa-b6be-9f07fd36f73e/mepoxukibamujixubiniki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31eaa6a5-ee0c-4e26-870a-f5e8752b015a/76518615621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab1e9828-de61-43b8-90c8-354295d6c93f/18241610752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f97ab2-f900-4dec-bb17-3cd6028c5ef1/31289164693.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_off000068d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5592 bytes
SHA-256: b8a16c23436732ed3bded65dfc42301ec7ba4b5d6251be3b9090552d7b91bb43
font_01_sfnt_off00007bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 10144 bytes
SHA-256: bd7fedb2dfe5dbb22c4baf00a9a68c1447471a6314d64b090e56a31f9caad9b0

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