Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fed0beffd882326…

MALICIOUS

PDF

42.7 KB Created: 2020-08-01 07:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6d076eadf99e41e874b1afefab535470 SHA-1: 23d3073ef9efea188efaee19b219a82d9ced2a71 SHA-256: 5fed0beffd8823264c7c438093d839c7c681573eb27fc24fc95224873bc2b7c6
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=how+to+make+a+link+clickable In PDF document text
    • http://files.femaesthetic.com/uploads/1/3/0/7/130775490/752212.pdfIn PDF document text
    • http://files.thewondermart.shop/uploads/1/3/2/7/132710704/6954647.pdfIn PDF document text
    • http://files.pnwbumblebeeatlas.org/uploads/1/3/1/3/131379312/jamisetanotuzava.pdfIn PDF document text
    • http://files.shopstudiofitrx.com/uploads/1/3/1/4/131453432/7be3761d3036e55.pdfIn PDF document text
    • http://files.americanreferralconnection.com/uploads/1/3/1/4/131406736/083e967ba.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/1/0434/5279/2982/files/ruboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/43587361950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9390/0968/files/93249169517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/total_gym_workouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/jonetutigobikate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/natemizagaxiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/jazefofitavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/6613118569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/xopakazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/samumurulinebaruvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.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_off0000604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 4928 bytes
SHA-256: 7e2372ff6585bca0d2d254bcc1a49a641421d2ccaa76653f9f3b94458737e6c0
font_01_sfnt_off0000710f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710F 14216 bytes
SHA-256: 5b06627ccb39db4e8ba4123b933cd37ba1311397e1783a5188a744091430f2ca

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