Malicious PDF — malware analysis report

Static analysis result for SHA-256 939238399073a87b…

MALICIOUS

PDF

51.8 KB Created: 2020-08-21 20:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 299a430dee57a52d9206a41545fe31d4 SHA-1: 0b2deb3b19ce9a15be72698c96af948f6e747c64 SHA-256: 939238399073a87b87b64d922cf60d5be335bcc9cb8748eecaf17df5712fb560
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for 'uc browser for iphone 4'. This suggests a phishing or scam attempt. The PDF also hosts a link farm of other PDFs on Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector. The ML classifier strongly indicated 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.ru/pify?keyword=uc+browser+for+iphone+4 In PDF document text
    • http://files.hollywaightdesigns.com/uploads/1/3/0/9/130969703/fbda584e105d.pdfIn PDF document text
    • http://files.leascorner.net/uploads/1/3/1/4/131406544/nidaleroma.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/1/0437/2289/9608/files/83528205197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/58742277504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/stardew_valley_lucky_lunch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/zirobobuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/12v_buzzer_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0743/5167/files/xisamutopogoluvof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/javelenalesinetiwodov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/twin_xl_platform_bed_diy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/4917/2382/files/4663905000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/tufonuxarirefigerakivisir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0316/2263/files/36976862217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/75130916727.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_off00008d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D29 5172 bytes
SHA-256: 0d48357c4f467b7e9f609f40e6f784ad2bb244b7d46c6cb6fea88601545986cd
font_01_sfnt_off00009ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECC 10412 bytes
SHA-256: 660eb812a2956e8458a90856ed4113cc41c7ca389fefe1ca912f50c16971b9c4

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