Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf83ef8e51fe84e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-07 17:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 235b4e0e463c6075f20c222aba56fcaa SHA-1: a7b8cedcbafdaf8822cef3eebaabbb2cad588dc1 SHA-256: 7bf83ef8e51fe84e4ce3ff55e61710e5563f7390c41281e0e61e546f104675fe
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically 'ttraff.cc', which is flagged as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=jpg+to+pdf', suggesting a lure to download or convert files. The presence of numerous PDF links, many pointing to Shopify domains, indicates a link farm used for SEO manipulation to attract victims. The ML classifier strongly indicates maliciousness.

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=jpg+to+pdf In PDF document text
    • http://wusad.oitsimapro.org/uploads/1/3/0/7/130738524/1191697.pdfIn PDF document text
    • http://tuzezexas.pinwellbooks.co.uk/uploads/1/3/1/3/131383791/7204844.pdfIn PDF document text
    • http://files.gayatripublicschool.org/uploads/1/3/1/3/131380440/modalasulu_vagukos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/19742769179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/28106148159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/16302600719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nepel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7389/2515/files/information_security_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/denasovemonowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/zasatikatutobavaxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1980/9447/files/ticci_toby_x_clockwork.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0426/2561/files/oxford_business_english_dictionary_for_learners_of_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/algebra_formulas_9th_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9538/8313/files/fram_filter_cross_reference.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 4196 bytes
SHA-256: 576b1beded16736d2125d1c13f36a31fc0ea932239f3f05413d8a3010ea681b4
font_01_sfnt_off00007595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 10076 bytes
SHA-256: b3f152ed5638149a889423d77fc95e854a0da1efa77765aab7e00ddb21fb10cb
font_02_sfnt_off00009807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9807 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c