Malicious PDF — malware analysis report

Static analysis result for SHA-256 864b880f98143cd2…

MALICIOUS

PDF

48.1 KB Created: 2020-10-04 02:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: deb574133a344c3271f1d4af18149afe SHA-1: 7cb2480234791672b73ffe95d2f9fa45d938c721 SHA-256: 864b880f98143cd235d6f7ba415c9769a95fb9b22a27d5a680ceaef8d89c992d
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://cctraff.ru/strik?keyword=bajaj+pulsar+200ns+spare+parts+catalogue+pdf In PDF document text
    • http://files.pdmmarketsolutions.com/uploads/1/3/1/0/131070722/7057381.pdfIn PDF document text
    • http://files.dthaikitchenthornwoodny.com/uploads/1/3/0/7/130738762/e25d30f.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/1/0480/8337/0148/files/nucleus_cochlear_implant_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2898/2171/files/rijifetipigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2681/1546/files/open_letter_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/4946/1415/files/53199195287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2379/7911/files/51712907017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9632/9377/files/jtdx_ft8_setup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6412/7388/files/naea_propertymark_national_conference_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/dsc_alarm_programming_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4488/5912/files/84510080692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0676/2905/files/98589170195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b36f92-ca44-455a-9638-5cb6298f458d/pasogorevifusajubewatob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2907c6-a975-4df4-91c7-bd30ed7dbf11/kezuzovifegosona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96dd39f8-093a-4af1-a4f0-ef9e2e8f2271/96618759659.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_off00006e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E70 5724 bytes
SHA-256: 98c9256634ab0ec5261f75b14baa357261cd353bed26f43be57617bba4ba82a7
font_01_sfnt_off00008203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8203 16236 bytes
SHA-256: 659706f685d0a3a2f710c00862d9db996911bc34f058e2083fc77676e46404b4

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