Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d3fbf50b6d15af…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 03:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48dd2f889b9ca8a288d66e10ab77c64b SHA-1: a3adca61f00b0660f643e2d51b0cf4d1e7be64bd SHA-256: a7d3fbf50b6d15af27dcadd124cb8215bfdcfec86bc636446dc7f22559692c88
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.ru, disguised as recruitment information. This suggests the document's primary purpose is to lure users to malicious infrastructure. No scripts were extracted, but the embedded URLs and PDF link farm heuristics strongly indicate a phishing or redirection attack.

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=wbsetcl%20recruitment%202018%20syllabus%20pdf In PDF document text
    • http://files.renewswindon.org.uk/uploads/1/3/1/4/131483281/3539652.pdfIn PDF document text
    • http://files.wheatgrasspublishing.com/uploads/1/3/1/3/131381414/tumirazerawufu_borefetefupo_sulunowuji.pdfIn PDF document text
    • http://nakitoxon.alcoholdrugevaluations.com/uploads/1/3/1/3/131384635/venazoxemuzebafibog.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/1/0427/5293/4044/files/fatamipiwasorumemitedax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/surixivezot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/mowerawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/bonded_space_maintainer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/bewiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2961/0141/files/design_e_comunicao_visual_bruno_munari_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/51900844894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0845/7877/files/juloriwadiguris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/tower_200_exercise_chart.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 6076 bytes
SHA-256: 2f7d6624c6e6d49a2dda1fb68eaa6f9e858d458dc77ede571c146a5f1323ac2b
font_01_sfnt_off00007a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A63 11260 bytes
SHA-256: 1b13e56b647bcbe4bb67fffca1bcc49fe4360df032095318d669ed2ec0e4cbaa
font_02_sfnt_off00009fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDD 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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