Malicious PDF — malware analysis report

Static analysis result for SHA-256 139a4472e8451c47…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 13:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93783d12bcfb6b6481dc52581f19c971 SHA-1: e0921a5ade092f485d6cec79be4caf43e7ee1008 SHA-256: 139a4472e8451c476c41083d72e95a1bb674db98eccb1a35fab1643c301adad1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and references to free downloads, indicating a lure. The presence of embedded URLs and the malicious redirector strongly suggest an attempt to lead the user to a malicious site for phishing or further payload delivery.

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=convert+pdf+to+dwg+online+zamzar In PDF document text
    • http://gezumala.joxytales.com/uploads/1/3/1/3/131398222/6cbccb0.pdfIn PDF document text
    • http://gikeru.ckrmleadership.com/uploads/1/3/2/8/132815367/e8ed35.pdfIn PDF document text
    • http://files.findyourcenterpasco.com/uploads/1/3/2/6/132695818/4727739.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/1/0440/8298/7158/files/48864606933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/the_boundary_element_method_for_engineers_and_scientists.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2758/5445/files/53869482212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/rojezalewamavisab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1750/6716/files/alter_ego_plus_3_cahier_d_activits_corrige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/sosusedagumarubazuvid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/98177162151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/kewexuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/ruwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/chemistry_placement_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/20373635232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7604/3423/files/80782918805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/xokovodogag.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 2

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_off000066ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AC 5292 bytes
SHA-256: be20fd955d336eeb02262a719e42f03f94a405547ff97c6ca9755375def4b33c
font_01_sfnt_off000078b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B8 10148 bytes
SHA-256: bc8949e352454203238a4fafa49e980ae9b4c41be1b2f534b8cefde03bdd990f

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