Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1adb2c801389620…

MALICIOUS

PDF

41.6 KB Created: 2020-10-10 00:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 018480fa73f672cb716d2eeea9a742c4 SHA-1: 62653ca68ca8a917ebe5f226ea39b8bee2d55073 SHA-256: e1adb2c801389620948a4022cef2360ee6363f51a7adb95bb5e62dea92c5c9c6
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=best+buy+northridge+ca+91324', which is likely intended to lead the user to a malicious site. No scripts were extracted, but the presence of malicious links suggests a phishing or redirection attempt.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=best+buy+northridge+ca+91324 In PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/44910183078.pdfIn PDF document text
    • https://site-1042360.mozfiles.com/files/1042360/fevogewabijoretiwisunikeg.pdfIn PDF document text
    • http://files.bulldogpen.com/uploads/1/3/1/4/131406610/turidumufenezofemiv.pdfIn PDF document text
    • http://bunenoluv.betterhealthyouthyoga.com/uploads/1/3/0/7/130739651/fuguvuvudig-xiresetag-suduref.pdfIn PDF document text
    • http://files.gatherhomeky.com/uploads/1/3/1/4/131438680/ruzuwib_kaloxegipire_negoxoxuk.pdfIn PDF document text
    • http://files.tmghumanresources.com/uploads/1/3/0/8/130873921/susowijigupu_kakevikuj.pdfIn PDF document text
    • http://files.guycockrum.com/uploads/1/3/1/3/131379321/e47d24d739b8ce.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/1/0483/6048/9120/files/final_fantasy_nes_volcano_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/google_sites_games_slope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0853/files/nisekaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/expert_grill_thermometer_how_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1635f6f7-fb54-49c0-b4f0-0557fc22255c/dofiwinogoteludumozim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf228479-988e-4100-bed3-47bdcd03ca9c/66781225900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a954cffe-1144-4088-9e20-7fd59cf40ccc/tubumofevokebodiv.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_off00005b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0F 6052 bytes
SHA-256: 2fcb9a2fda127a2962a2c20568866bac6a3c42d10302df448f72d0b69b01fa4f
font_01_sfnt_off00006faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 13276 bytes
SHA-256: 866855884e2b8e146863be7861c6e4ac8b465ba26fd855e29599e7e172bb98a6

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