Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f538ec8dcd8c5e…

MALICIOUS

PDF

36.8 KB Created: 2020-08-24 08:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e67264a0e8f3be606ce6525232d0f3f7 SHA-1: 46e8bb8e4d74b37b190dae1b7f41c5415ba24928 SHA-256: b8f538ec8dcd8c5e4ee7ae7af1f99f0968ce52f4bbe8856b6a7118edeb22d4e4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the primary links points to a known malicious redirector, ttraff.ru. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document body and heuristics suggest a link-farming attack pattern.

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/pify?keyword=3+column+columnar+pad+template In PDF document text
    • http://files.sydneyruby.com/uploads/1/3/1/4/131437453/zivekedojepujomina.pdfIn PDF document text
    • http://files.mustardseedsgrow.com/uploads/1/3/1/1/131164260/rofep.pdfIn PDF document text
    • http://files.tambo.ca/uploads/1/3/1/3/131380308/f6f378e5.pdfIn PDF document text
    • http://files.nspheadstart.org/uploads/1/3/0/7/130739971/xejelanazi_zitenafadeduto.pdfIn PDF document text
    • http://vulub.pleis.us/uploads/1/3/1/4/131438304/guvozamuli_jupamusuzese_puwexudijarew_gozikajarox.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/1/0428/3393/6547/files/64805439435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/zuwezamiwegadeforak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/cdr_to_online_conversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/44302589475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/biodynamic_farming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/bagpipe_music_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/43720841008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/sim_unlock_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/sbi_new_atm_card_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/20978206758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/polymer_powerpoint_templates_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000525f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x525F 5108 bytes
SHA-256: 7eaeb139965b2600ed57df4ab3b5fee18b1e331edc5206dce0c9f14a1ae66bb5
font_01_sfnt_off0000639f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639F 10172 bytes
SHA-256: 4409b9ed3956860702996aab3e7053ff35abd84dedeec6a575fafe7a20bb58f7

Open this report in the interactive analyzer, or submit your own file for analysis.