Malicious PDF — malware analysis report

Static analysis result for SHA-256 88004f49bb9798fd…

MALICIOUS

PDF

50.8 KB Created: 2020-08-14 20:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9e545ec05fec12b7ea23c21c56337af4 SHA-1: 3416f024659ff92a800e4d109bee2446dfcb4bad SHA-256: 88004f49bb9798fddcc6270060e85c70f785889183168bf8342849225faf33b1
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://ttraff.com/pify?keyword=android+auto+compatible+cars+2017 In PDF document text
    • http://files.anviltraining.co.uk/uploads/1/3/1/6/131637679/3214309.pdfIn PDF document text
    • http://files.aliconway.co.uk/uploads/1/3/1/1/131164310/5742206.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/1/0438/2870/7485/files/dwarf_cannon_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/dazij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/aarp_games_mahjongg_candy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/48847892020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/rufilukuxasenoxupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/zelejito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6628/5480/files/55643343295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/ff14_the_blessed_treasury.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/jojav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/79065190034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/e_business_journal_article.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/51816420502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/13322206139.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_off0000804f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804F 5752 bytes
SHA-256: 9cca830fbdeb2bd86fdf2a5bac13d4501b5139da7e0d344213200d6a036a4c42
font_01_sfnt_off000093cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CD 13268 bytes
SHA-256: 92bc5162b8d43fe26d018e7b2fae0dab9fb51658bbfe9f28d9076700f43ea48a

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