Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f75c971e7d728de…

MALICIOUS

PDF

47.6 KB Created: 2020-08-26 01:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e7b87150e5e86cf74b01c483bfb399c8 SHA-1: 4036c9683bc089abcce250fa904232302fe36fa8 SHA-256: 7f75c971e7d728de16691ef17791095607ac06957072bc41a86301e935daeb36
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm and redirector, pointing to the malicious URL https://ttraff.ru/pify?keyword=how+do+libras+act. This suggests an attempt to drive traffic to a malicious site, likely for phishing or to serve a secondary payload. The ML classifier strongly flagged this PDF as malicious.

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=how+do+libras+act In PDF document text
    • http://files.britttanya.com/uploads/1/3/1/4/131437834/2a96d7c0d4636.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/1/0433/1916/5086/files/polid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/wigebudaporikip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7736/1824/files/ap_calculus_derivatives_test_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/ts_16949_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/35311996255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/cara_membuat_cv_dengan_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3641/5899/files/19840011495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/19746967784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/scotsman_guide_logo.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_off00007cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB1 5128 bytes
SHA-256: 920d9a21997c99cbb8028c1d69a03877c2c534ee18fbfe0b69cd9b059f311099
font_01_sfnt_off00008e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3A 10420 bytes
SHA-256: a88db58e1fe45ef075c9712afae3811b431e9662303e02c9914e3a5a24fcb7b7

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