Malicious PDF — malware analysis report

Static analysis result for SHA-256 f809dc9c38f98189…

MALICIOUS

PDF

37.8 KB Created: 2020-10-06 22:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 48d41934f8aa17ca76d2c8bf3c766792 SHA-1: 7da57fb5550db2017a2e92b65b68819a829049e3 SHA-256: f809dc9c38f9818985165a8065e05ebf98e6bf7f05e9967d991d807d5547f5e9
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://gettraff.ru/strik?keyword=download+steven+universe+episodes+fr In PDF document text
    • http://files.redbarnsaintbernards.com/uploads/1/3/1/4/131406263/c257b.pdfIn PDF document text
    • http://files.ijcmr.com/uploads/1/3/1/0/131070712/f2a1542.pdfIn PDF document text
    • http://files.theplayfactoryplaygroup.com/uploads/1/3/2/7/132740541/fd4f13d.pdfIn PDF document text
    • http://files.pittmovers.com/uploads/1/3/0/8/130813757/700897.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/1/0483/4312/2071/files/harry_potter_community_day_september.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1586/8063/files/zebul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9910/5696/files/barometer_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/orange_front_door_colors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0098/9349/files/maveridomupetekiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2780/8935/files/55725791156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8802/4230/files/xfinity_dta_remote_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7982/6584/files/zimakexiwajutativivoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/cpa_exam_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8824/9500/files/rofedebiraja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3627/3559/files/towuvawiteledefitor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8232/4637/files/genokaxepu.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_off0000556d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x556D 5184 bytes
SHA-256: 89cae399109378c3fc2ea63f8ee5b26218c46eadb32346bd0b4dfa247aa3f91b
font_01_sfnt_off00006742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 10304 bytes
SHA-256: a9b0d5855d0c10ce28436652d825263e18d2805967014eea7b8a13b91a88503e

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