Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2aaf205139cc101…

MALICIOUS

PDF

49.1 KB Created: 2020-10-16 23:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 645912bcbec2a156a1c76c354b0f8ec1 SHA-1: 54b7e0ba166e4fac4e8d6db1b880dbcddbe9fff3 SHA-256: a2aaf205139cc1015ce7f11f99dd6188ac7f3ee09049ec73785488d0b0f4e724
184 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to various hosting services. One of these URLs, 'https://cctraff.ru/strik?keyword=woman+on+mars', is identified as a known malicious redirector. The presence of a large number of external links, including those on disposable hosting, strongly suggests an attempt to direct users to malicious content or phishing sites.

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.
  • 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://cctraff.ru/strik?keyword=woman+on+mars In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f87583f7ff95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87285def5d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f87c4ca7fbf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f8896b4b9ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f88f55d1d01e.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/4733702.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/sosivigus.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/1cb9894be10.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/suxamimewol.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/7bf01a8e81.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/tijame_wiwevuba_morupuxetenob_darolel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2932aaae-d0a2-414f-a91a-3a2a46e47556/pepuwiseviremivejoguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6be3b9-ac5c-4900-8769-31140f8c134b/vonewetudepalekit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8524fbc8-9ebe-45f5-b2bf-a63c75cc635b/69685905726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9ce15c-8d5a-4855-9e7c-6ad46dcb6f94/35106000688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef556e14-cf59-4427-b19c-b29169ba2c4d/kopesibesizigixegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d629288-cf54-441c-b1ba-198713ad3e46/72650115059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e020300-0bc1-4ce9-82ea-bfd87c571605/japatalabazazukaxutuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90cadc0-a3d3-4a1d-8b5a-51812a7d4d4f/mogagegajiraxutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b70004-9f87-485a-82a4-75418012ef6d/3041004549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4371/1897/files/24322176080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/36109567975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/philips_air_fryer_manual_hd9218.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_off000081e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E2 4812 bytes
SHA-256: a252dc0cfd29cd50065b6326c9d03b0047e7ab3d90a57118ef614efa7a29d5b9
font_01_sfnt_off00009226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 10740 bytes
SHA-256: 1a47892f9852c4e9f7794492854633bdd0e5e1dca0e8083946dc625f6ae95dfe

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