Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c2aa0e70de9277…

MALICIOUS

PDF

39.4 KB Created: 2020-08-19 12:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1301516043b71a6945b22e2b1129ca9c SHA-1: 93e994afa1acf96bd8cee4a398c5f286417ba01e SHA-256: 16c2aa0e70de9277f7393e63a83282a887b2d6f9c7f71b8094244cefe785ac61
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors and SEO link farms, indicating a phishing or malicious download attempt. The document body explicitly mentions 'iphone x buttonless ringtone free' and includes a URL that is flagged as a malicious redirector. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

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=iphone+x+buttonless+ringtone+free In PDF document text
    • http://files.crimsonmist.com/uploads/1/3/0/7/130738696/7cb1f0a1340257.pdfIn PDF document text
    • http://begime.biglittlebrains.com/uploads/1/3/1/1/131164250/jogixa.pdfIn PDF document text
    • http://files.chrisgriffithdesigns.com/uploads/1/3/1/0/131070098/6625889.pdfIn PDF document text
    • http://files.olmlancers.com/uploads/1/3/1/3/131381679/5c4eae.pdfIn PDF document text
    • http://files.mcclainmatthewsinsurance.com/uploads/1/3/1/4/131409090/7232005.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/1/0430/6783/4517/files/big_bend_national_park_trail_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/harbor_freight_winch_mount.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9893/0341/files/formal_dress_hire_christchurch_nz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/38484500212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/nogerunesosuxusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/lesexavukorod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/definition_of_phonology_according_to_experts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/xufenelideduwoxaxig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/engineering_mechanics_dynamics_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1017/6662/files/21352174515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/97401056517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/sabelexariwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0391/1076/files/axis_bank_current_account_debit_card_application_form.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_off00005ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA1 5096 bytes
SHA-256: 496c9375383454dadf0f96d9ce2d45e51e272ef92e9c65c837850c45b5af0818
font_01_sfnt_off00006dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 10168 bytes
SHA-256: 1df08a677280d479dc8f0621775c3a3af6b02e31f63a633d2324bcc7d0284c19