Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5a5b4183770f30…

MALICIOUS

PDF

40.6 KB Created: 2020-09-29 16:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 085412a1cdcd92ce3bbc0643ae9ea838 SHA-1: 3791fd62db656d947132859339cb34129b88daf2 SHA-256: dd5a5b4183770f308ce9248bc020786336e8834c4be24496bee5e331251d4922
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.cc/pify?keyword=the+glass+castle+study+guide+section+1 In PDF document text
    • http://files.hawaiicreativemedia.org/uploads/1/3/2/6/132682994/bejisuloburur.pdfIn PDF document text
    • http://files.wyndcharmsilkenwindhounds.com/uploads/1/3/1/4/131455680/302703.pdfIn PDF document text
    • http://files.spherenvp.com/uploads/1/3/0/7/130776673/dukeketomosojozez.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/1/0428/2885/7503/files/bularelewupupug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2475/6131/files/south_florida_container_terminal_n775_tracking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/sun_system_accounting_software_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5625/9491/files/95687324299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4482/1399/files/neb_bacterial_transformation_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/example_of_bi_penniform.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3427/9062/files/synergistic_gangrene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/xaduluwob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/best_freenas_plugins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5511/5171/files/pirukutedanawibozutete.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_off0000626b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 5208 bytes
SHA-256: 24457fb222e03e9de03273a03c64bb37750c98446423ac97dd5241c2657167ad
font_01_sfnt_off0000742f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742F 9828 bytes
SHA-256: ea89b006882095e98f5a8c3086f05448a6d1f9dc56fabcdf32bbe87d6f5f3959

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