Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d6995003627c70…

MALICIOUS

PDF

48.5 KB Created: 2020-08-01 04:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dd456ba5287bdb65f940a4e632986b20 SHA-1: fb4ca3cf4b4dc520536e1e2885d8cb7292aea761 SHA-256: 35d6995003627c700d576eff394c3f5df3103d1549a9886d157336c7d5009bcc
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=mmorpg+of+2016 In PDF document text
    • http://files.angelagoodmanart.com/uploads/1/3/1/1/131163737/5881796.pdfIn PDF document text
    • http://files.uruguayanchamberusa.com/uploads/1/3/0/7/130740298/tinogatuxolur_pinizikobivi.pdfIn PDF document text
    • http://files.kybercave.com/uploads/1/3/1/6/131637016/gutovevubejeke.pdfIn PDF document text
    • http://files.humanpoem.com/uploads/1/3/0/7/130738765/ce7b9cea9869d.pdfIn PDF document text
    • http://files.tinytreasurehomes.com/uploads/1/3/0/7/130775561/1d6dd1756c9b33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0998/7992/files/jesizim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/mitubotozemajage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/59976519402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/monavot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/zokifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/79485413300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/rumedabirogem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/12979905744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58085676994.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 4720 bytes
SHA-256: 902ca0104cb8fdbd8425c3eca427d4d65831f7db09d927a1788c8982372e7314
font_01_sfnt_off00008513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8513 10100 bytes
SHA-256: ceedb3cdfb11a5f0506799c89fddcb9d85177b45e049747cfb898962f01fad6e
font_02_sfnt_off0000a798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA798 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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