Malicious PDF — malware analysis report

Static analysis result for SHA-256 281d39cb40bed5a6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-04 23:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80744b9c249580dce5273c2a4c903712 SHA-1: 4821a6609ac08f5476743272fb31872fc2fdec34 SHA-256: 281d39cb40bed5a618c02f8d58718dc98358bdadbd3a37a9db9716a7bee30989
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL is 'https://ttraff.com/pify?keyword=architectural+design+brief+sample+pdf'. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily corrupted, limiting further analysis.

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.com/pify?keyword=architectural+design+brief+sample+pdf In PDF document text
    • http://files.madameburnett.com/uploads/1/3/0/7/130775845/8298669.pdfIn PDF document text
    • http://files.zhiguohe.com/uploads/1/3/0/7/130775304/20b19caba8.pdfIn PDF document text
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdfIn PDF document text
    • http://files.scacademyofauthors.com/uploads/1/3/0/9/130969503/6049361.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/1/0429/3469/8147/files/31706182775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/1479443273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/camino_de_santiago_frances_en_bici.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/birumewifegetepewifad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/gimiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4965/4184/files/zizigonesevirerijebuleku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/design_patterns_examples_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/jajofeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/95936166737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1010/5255/files/bashir_badr_poetry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/innocent_smoothie_recipe_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/nasuroge.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_off00006993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6993 5700 bytes
SHA-256: 942db371883ec1b4f0aa1f35ac3382bb0d27d2c8f7e627d6617887716855383e
font_01_sfnt_off00007cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC9 9816 bytes
SHA-256: ad7811fc59a699f835840471a7fc16dfdebe103f31985ef467523bc4f04fee02

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