Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c5ff9b9577a956…

MALICIOUS

PDF

50.7 KB Created: 2020-10-01 02:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: de97ce422982d40557db91834bdac626 SHA-1: 6ec7bf7bbbd9f3622c15ed014085c1b9953657d5 SHA-256: c6c5ff9b9577a956dfe34a4e95040c4f7dff7d16c9b82c95e61364124d5dde05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=d.+c+motor+in+hindi+pdf'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the presence of numerous other PDF links suggests a link farm or SEO manipulation tactic. The ML classifier also strongly indicates maliciousness.

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=d.+c+motor+in+hindi+pdf In PDF document text
    • http://files.innovationneighborhoodphl.com/uploads/1/3/0/9/130969810/1527140.pdfIn PDF document text
    • http://files.roofing-waterproofing.com/uploads/1/3/0/7/130739112/gozuvatafexofu_monapopojepo_woxekilorajedak_rapaxi.pdfIn PDF document text
    • http://zegab.mybpro.org/uploads/1/3/0/7/130775490/be0d88d6d6172.pdfIn PDF document text
    • http://files.schnauzersetc.net/uploads/1/3/0/7/130739116/4297413.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/1/0431/7554/2950/files/bexuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/jogos_ppsspp_pelo_mega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/43881502769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4860/3300/files/xakubinivukupageloke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/zurogewiporuvuluraboxen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e54bff2-e3c1-4140-9d99-46ddc79b7fe4/89127225337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf2a11e-caeb-455d-a775-7d15cc3c998e/18513193029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de785c75-6388-4b71-910c-059559aa079a/29683203416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3847/2357/files/sanirixowodara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9180/files/xelomuwixupimavexebefoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/dijewapenajoragokamofal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/48018980603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8179/1643/files/wabajujumovawiv.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_off00007e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E44 5008 bytes
SHA-256: cf3c45992004b0c353e8507668bcbc16ac4062c74a3cfef4386f50770373ddbb
font_01_sfnt_off00008f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2B 15224 bytes
SHA-256: 6219c06fcf56df15c6a9be95f83108f1b4cad9c181a604a3f5b23c28e5d95b93

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