Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1825774aba340f…

MALICIOUS

PDF

45.0 KB Created: 2020-08-10 20:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3749cc64555c50e5cd588333bb0f2bb9 SHA-1: 6a257ab1fd784652642733fdc70994bada9a6dff SHA-256: 9e1825774aba340f72c1621286770d6df6b704096994d6155d516a04a6bc9fa7
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.ru/pify?keyword=submarine+refrigeration+and+air+conditioning+systems+pdf In PDF document text
    • http://files.farmingdalesummit.org/uploads/1/3/1/0/131069860/50fc7c5375ce.pdfIn PDF document text
    • http://rirez.star-resources.co.uk/uploads/1/3/2/8/132814930/finipejakobiwamip.pdfIn PDF document text
    • http://files.hlhas.com/uploads/1/3/1/4/131483550/wuvoxipepuzan.pdfIn PDF document text
    • http://files.kiyashanti.com/uploads/1/3/0/7/130775002/moxotute_zokekabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/66826491929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/94218103577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/sir_syed_ahmed_khan_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/alternative_energy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/12426132058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1675/7154/files/discord_highlight_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/ttd_potana_bhagavatam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/59353690173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/kivaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/45744657605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/chiang_mai_tourist_attractions_map.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 5672 bytes
SHA-256: 09fab69c2e8bfa3823de2ed32659b908eb4e193bac9383188d9162682417aa5c
font_01_sfnt_off00007644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7644 9880 bytes
SHA-256: 7743bce5dc3cc865f86fb16fd475768b73aa3bada30a9aa4536118dc70967ad1
font_02_sfnt_off00009813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9813 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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