Malicious PDF — malware analysis report

Static analysis result for SHA-256 161908f7b6a89777…

MALICIOUS

PDF

40.3 KB Created: 2020-08-18 16:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6654cd4e56ac2cfffc9af0a1cc1d47ad SHA-1: ff8a464167cb7c7052445b79c330b1819e53b8a4 SHA-256: 161908f7b6a89777b8958645da071f3222305026fcea2d127a042285f4a76036
234 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ttraff.cc/pify?keyword=transfer+contacts+iphone+to+android+google In PDF document text
    • http://files.chriswarrendickins.com/uploads/1/3/1/3/131380625/c12fc1a7.pdfIn PDF document text
    • http://somitodo.leetrull.com/uploads/1/3/1/6/131636648/43e5dcb3d4fb.pdfIn PDF document text
    • http://files.douglasshaunephotography.com/uploads/1/3/0/7/130739107/b683124c1a3b71e.pdfIn PDF document text
    • http://files.eugeneysantos.com/uploads/1/3/1/1/131164424/3487690.pdfIn PDF document text
    • http://files.yachtclubclothingco.com/uploads/1/3/0/7/130739831/4024927.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/1/0434/0708/1630/files/sobezur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4416/5016/files/sample_descriptive_paragraph_about_a_place.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/guwokeduvudewebosenuwet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/24679698602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3032/2071/files/vanakodogekadujalidim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/bigenisune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/39493369621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1419/2284/files/nyc_food_protection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/zatiserusagogiviko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/18392885401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/xevilapojuvaxuxibilinuso.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_off00005f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 5368 bytes
SHA-256: edb87a0cb3541a2a87d89c8364f6731d184dc8515cb4b040b55921ad3a56dc28
font_01_sfnt_off000071ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BA 10124 bytes
SHA-256: 1adc2e82c120ca932c173e84247f5b9829631c86f1e15c2feb3188842a513f2b

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