Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0f869e372b5aa1…

MALICIOUS

PDF

35.1 KB Created: 2020-10-04 07:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 221d0b0c79f880a238dac8e94fd434f8 SHA-1: a9f2f4fa07f8fdea0499c0be3187d95ab464dd34 SHA-256: 9b0f869e372b5aa1e23379c7b5e990e112b76e7178ec5db7781ef63c4e6ab922
214 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/strik?keyword=pioneer+deh+2400ub+change+color In PDF document text
    • https://site-1043314.mozfiles.com/files/1043314/buzewit.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/jojotimuvom.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/beledidetogu.pdfIn PDF document text
    • https://site-1039465.mozfiles.com/files/1039465/21206862145.pdfIn PDF document text
    • https://site-1038387.mozfiles.com/files/1038387/tixema.pdfIn PDF document text
    • http://files.allergysmart.org/uploads/1/3/1/1/131163914/892849.pdfIn PDF document text
    • http://files.destinylifenetwork.org/uploads/1/3/1/4/131438018/3554313.pdfIn PDF document text
    • http://mamele.henrytyrrell.com/uploads/1/3/1/4/131453565/909881.pdfIn PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/xagivigavafeni.pdfIn PDF document text
    • https://site-1039830.mozfiles.com/files/1039830/31172545492.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/1/0432/2879/0946/files/51641455029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/virevefaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/malekusolipexubodotifozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4595/9845/files/tazivomasitegepepapame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9834/4091/files/olympus_om-1_manual_for_sale.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_off000048db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48DB 5524 bytes
SHA-256: 2b0c9513596660c67f4ce1b103a45159c50fcc218d7d7860d32959a52637e74f
font_01_sfnt_off00005ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 10516 bytes
SHA-256: 5db40bb7835ff45552e13a1a48ac4c461e1cea5a02e009b789e4d48b4033fc84

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