Malicious PDF — malware analysis report

Static analysis result for SHA-256 d864fd1de471353a…

MALICIOUS

PDF

46.9 KB Created: 2020-10-10 03:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 16daaec0c704af1a6686a987beb610da SHA-1: 774dd7745356f78f5910b744c18f23f53c468fdf SHA-256: d864fd1de471353ae640698b507ecaf518a0c5473420ee7aa7687f91c0c631fe
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=taco+tuesday+san+diego+downtown In PDF document text
    • https://site-1038792.mozfiles.com/files/1038792/99210492377.pdfIn PDF document text
    • https://site-1040124.mozfiles.com/files/1040124/55076236893.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/1/0481/8046/1717/files/unit_3_molecular_genetics_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5587/6769/files/hamilton_beach_big_mouth_juice_extractor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7326/8633/files/12788971658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3986/6018/files/53863462275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/des_moines_county_jail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3000/1302/files/geviwozub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8622/4791/files/modern_combat_5_apk_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/98219732360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3223/1327/files/28449850270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8934/0832/files/83609160222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9425/8079/files/zelugok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5895/2872/files/77436157674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7680/7577/files/destiny_2_mercury_public_event_timer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7368/1061/files/61604823006.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_off000077e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E8 5120 bytes
SHA-256: 065f372b6e75e2ef38e6db2ccbb8e5f39a182bd1f2b4f51b0ff7d950462213ec
font_01_sfnt_off00008984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8984 10908 bytes
SHA-256: 8099d634af2094d55a4e4fb2bef265ce244226f3961fe7631aaea7336f0dd797

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