Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc56fe0ba8c35598…

MALICIOUS

PDF

34.7 KB Created: 2020-10-07 07:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 628997ca20ee0c7cd54b9fe18bf658b5 SHA-1: 5b7b627ffd04385cd8d71c2b0e3612a9464c8312 SHA-256: cc56fe0ba8c3559858f814d55f589cee8003404705174034bd82c4818edaa789
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=lifespan+development%253A+lives+in+conte In PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/lasimovamiwiviwijepinun.pdfIn PDF document text
    • https://site-1048222.mozfiles.com/files/1048222/94848906197.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/jakan.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/96804648794.pdfIn PDF document text
    • https://site-1039148.mozfiles.com/files/1039148/pobude.pdfIn PDF document text
    • https://site-1038525.mozfiles.com/files/1038525/52839598293.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/1/0486/2420/5982/files/52092482753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8472/9502/files/25164116231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2536/1817/files/dosukamenalefuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4293/9290/files/mapoposavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0016/7072/files/periodic_function_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4632/8737/files/pokemon_discord_server_sword_and_shield.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7829/6746/files/gapixinojevokimeviwimuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2452/2143/files/janiterizebusavemov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8244/1638/files/munot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3728/0414/files/big_5_warehouse_application.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_off00004a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A6C 5256 bytes
SHA-256: bab1ee0dcaae1bb16c42435f207ceef0fb5c6ceac7d387812a28ea13daf492fb
font_01_sfnt_off00005c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C50 9844 bytes
SHA-256: e2c04e27481e14ea374dd0cfff7d601e96b594215ae91f8f15dc10ba4b8d63ba

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