Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bdbcfc374e976d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 13:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce8ed24b5a75c2723ed0e1ce51be2f00 SHA-1: 8240a38fb9c273628277154d84d3cfca14fb3637 SHA-256: 82bdbcfc374e976d6f7abe9d5a8208aa1da221bfff01ea0221d86437ef9626e9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body and heuristics indicate a lure related to a 'daily attendance app' and a 'free download' SEO farm, suggesting a phishing or malware distribution scheme. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=daily+attendance+app+android In PDF document text
    • http://files.wiseowl3rd.com/uploads/1/3/2/7/132740905/bixej-movaresedi.pdfIn PDF document text
    • http://bupexot.loanheadcc.org/uploads/1/3/1/8/131856476/wamedikebiwos.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/1/0438/0796/5345/files/midas_trend_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/yarg_anahtar_kelimelerle_eitim_bilimleri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/92128660894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2187/6900/files/sazuwabogulakaveburigusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/putifokawuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1450/3075/files/91955377121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/what_is_closure_in_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8923/9969/files/born_a_crime_chapter_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/52851268458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/77342165995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/eminem_marshall_mathers_lp_2_download.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 3

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_off000066cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 4988 bytes
SHA-256: 1d71a02239b81a8e96e2629247c56cf1ff503e383c80f37ae9a13be053c10fd2
font_01_sfnt_off000077cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CF 10300 bytes
SHA-256: d62ea93a5ded61e34f5fcbe73ff07b6899f577ee25ad4fa2d7fc5fadeace1d46

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