Malicious PDF — malware analysis report

Static analysis result for SHA-256 a608337900912ec8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-24 03:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c0b071ebb3328848969b6e829888639c SHA-1: 5c3918b0e73c8345672102c8bbce5707fefc305a SHA-256: a608337900912ec856b49e38d8cbe2035c82dd85d619bd2f9bcfcc80fed62703
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.ru/pify?keyword=catholic+school+uniforms+omaha+ne In PDF document text
    • http://files.localbeetmealprep.com/uploads/1/3/0/7/130738720/4707527.pdfIn PDF document text
    • http://files.kristyntrickey.com/uploads/1/3/1/6/131606411/wenapugijom.pdfIn PDF document text
    • http://files.hearthsidemeadow.com/uploads/1/3/1/4/131438667/2508384.pdfIn PDF document text
    • http://lajupo.darrylstrange.org/uploads/1/3/0/7/130775118/jugego-winobupus-xajakotipanap.pdfIn PDF document text
    • http://files.rebeccabeaird.com/uploads/1/3/0/7/130739590/5001845.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/1/0430/8946/1410/files/51215737659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0410/3576/files/ine_workbook_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9449/7698/files/54385748497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7957/3160/files/osmosis_and_diffusion_lab_question_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3514/0007/files/lojagoxaxowotefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/meilleur_correcteur_d_orthographe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1753/5397/files/xafebenederizemor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogudanivivakow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/sims_3_jordans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8034/3961/files/meroruzadesijalijewodavur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/cellulitis_treatment_guidelines_up_to_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6331/2535/files/83701915022.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_off00006002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 5024 bytes
SHA-256: f1d661a944a6c7110360f5663bdd28710b37b929c48379df14fa27ff199b2577
font_01_sfnt_off000070e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E2 9956 bytes
SHA-256: ea5523614ee9c2ed04b0c670ecd9b48aff31fddc2bc6249483904c52202feabe