Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a04a78f66240cc…

MALICIOUS

PDF

42.7 KB Created: 2020-09-18 04:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: eb7ed0bf732ee0d426992eb9d25659f9 SHA-1: 39af101380e1de6c5d59df81b5599f4b30e5233f SHA-256: 70a04a78f66240cc242bc431b3ddf7d0b13299c1f07e7ddea93c76a31b379ba3
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=non+linear+relationship+equation In PDF document text
    • http://files.lifewithpetsgci.com/uploads/1/3/1/3/131380480/nasitawomekefaforepo.pdfIn PDF document text
    • http://files.drlesliejenkins.com/uploads/1/3/1/3/131379054/jokuvoduguduxijepeg.pdfIn PDF document text
    • http://files.rocksteel.co.za/uploads/1/3/2/7/132740488/4065338.pdfIn PDF document text
    • http://dijojef.joylsherman.com/uploads/1/3/1/0/131070450/2b04052c.pdfIn PDF document text
    • http://files.catholicfamilycelebrations.com/uploads/1/3/1/4/131437636/5805799.pdfIn PDF document text
    • http://files.dvorajewelrystore.com/uploads/1/3/1/0/131070374/2096935.pdfIn PDF document text
    • http://xifuv.denverchinesesource.com/uploads/1/3/1/0/131069839/fivazape-wonofalasosu-nofenibelisifu.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/1/0435/8881/2959/files/whats_my_rule_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/lagu_ari_lasso_penjaga_hati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/best_transmission_blocklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/nalovudewabuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/tutevikara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/applications_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/50886587502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/world_of_final_fantasy_icicle_ridge.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_off000069d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D0 5000 bytes
SHA-256: 275c4c62b8d9e2c9cdb05f26f019fdf6dd8c9f9ef1d7f88e092380334a869bfe
font_01_sfnt_off00007ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD0 10120 bytes
SHA-256: a156c5e8cd584ed2eb371fcfa109ed3e82053e1be7f6e6379fa6e5f4c6a126b1

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