Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a8eb5539ee6640…

MALICIOUS

PDF

44.5 KB Created: 2020-08-14 01:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d908fabce28b26a08910b3dca111141c SHA-1: 26bbf65d26b4fb3f3abdc654440db4fd527df6b7 SHA-256: 82a8eb5539ee664030c028c89fcda2f3c1a875d0764a1061156e71fbea34bfd6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to redirector URLs like 'https://ttraff.ru/wb?keyword=2019%20cars%20with%20manual%20trans'. The heuristic firings indicate that this is a link farm designed to redirect users, likely to phishing sites or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself facilitates the malicious redirection.

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.ru/wb?keyword=2019%20cars%20with%20manual%20trans In PDF document text
    • http://kulelamur.drinkeuphoriacoffee2go.com/uploads/1/3/2/7/132712093/ff54e7.pdfIn PDF document text
    • http://files.laughingnature.com/uploads/1/3/1/8/131856173/ae0db62d9187.pdfIn PDF document text
    • http://wujuvatem.leiladyamy.com/uploads/1/3/0/7/130739456/febasetameviguberosi.pdfIn PDF document text
    • http://files.gracemotionanddance.com/uploads/1/3/1/4/131437376/8466166.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/1/0437/2830/6341/files/6328132028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/avalon_game_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/77473253975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/golwalkar_books_bunch_of_thoughts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/92030461359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/20150036375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/belasumuvaxibikuluperudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/zuzivimagorerim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/burrhus_frederic_skinner_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/47857046952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/kazoverefiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/antonin_artaud_poesie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/88252053369.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
🗂 Part of campaign: ahta.info 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 5516 bytes
SHA-256: b355ccf2df0dd6b7fb398208b584970dec6bc409d1f3ad74216aa0a4295caf7c
font_01_sfnt_off00008167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8167 10428 bytes
SHA-256: 15b5199018a8cdfdadd2c13af60015943e02bb0135056bb3af723b1fc4ea43e3