Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a5a2cdcb814e2c…

MALICIOUS

PDF

37.9 KB Created: 2020-08-05 04:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fadd4e74632bdc89797d5df377f59294 SHA-1: ac4bc4a0f1909c435aa843da11b284cdca8f8f22 SHA-256: 77a5a2cdcb814e2c8fe3020e71310ff4c6ca109e1dccb1d47b943197c6680ac5
214 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, likely for phishing or malware distribution, disguised as a product document. The ML classifier strongly indicated maliciousness. The presence of embedded URLs and the redirection to known malicious infrastructure suggest an attempt to trick the user into visiting a harmful site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=castrol+edge+turbo+diesel+titanium+5w+40+pdf In PDF document text
    • http://files.ibteens.net/uploads/1/3/1/3/131383358/faxurugisuvuvef.pdfIn PDF document text
    • http://files.mmjhorchestra.org/uploads/1/3/0/7/130776131/wuderezu_fibasopegijo_tijemide.pdfIn PDF document text
    • http://files.rootedlifecoach.com/uploads/1/3/2/6/132681971/juketuzuloxivux.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/1/0431/6931/7013/files/2296858632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/40644408277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/61922049610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/91222213029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/rutofolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/48852175051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/lirofufiritarozaken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/5234739698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/12318985288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/56198372107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/va_form_28-_1900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0514/1411/files/vadezane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/zobow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/refisixol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/taweterovomalupiberew.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDD 5852 bytes
SHA-256: 6c6e2bdb5b825e57b6bc96c1969bb1e549ad75430106fb6e07655ac04cde2aa4
font_01_sfnt_off000063c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 11344 bytes
SHA-256: c36fa23f034f4889425369c427d912f0738e81441b5922c491813d884db0f72e