Malicious PDF — malware analysis report

Static analysis result for SHA-256 66cfea7729fe0a61…

MALICIOUS

PDF

56.4 KB Created: 2020-08-17 00:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4af38bbf0e70e77c62ec07122432220 SHA-1: 12bec9dab2f5299caaec25acc67c15ed010ac9c7 SHA-256: 66cfea7729fe0a617b6148a9ab2e66307300572589ae6c2cd33edc5e665c02ee
214 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body and heuristics suggest a lure for a 'math solver' application, likely a phishing or malware distribution attempt. The presence of many SEO-optimized PDF links indicates a link farm used for traffic generation or SEO manipulation, often associated with malicious campaigns.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=math+solver+with+steps+apk In PDF document text
    • http://files.newbeginningsintuitive.com/uploads/1/3/0/7/130774964/lamif.pdfIn PDF document text
    • http://files.wrladyhornets.com/uploads/1/3/0/8/130814351/birejukuge.pdfIn PDF document text
    • http://files.anthonylaurienti.com/uploads/1/3/0/7/130738725/towubotize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/wolenoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2656/0677/files/11853853154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0375/6196/files/32728848170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/mac_missing_xcrun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/87477486447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/33632517680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/garesuriranito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/6826/3317/files/genetic_algorithm_filetype.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5430/0327/files/44986460587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4396/1504/files/vusafadenafilesug.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: indiachinaconjunctures.org 3 samples

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0F 5128 bytes
SHA-256: 6fa9fdbdf7fecf168fc1c39ee9cc8860b0a1a5a68518fe9f4f75bc9df002051c
font_01_sfnt_off0000708f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708F 1924 bytes
SHA-256: 2b0241898a6eadc7d430edd7eabb6e4cabc09689812b08bb3c6d075ae023a393
font_02_sfnt_off000079b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B1 10668 bytes
SHA-256: 42189451c4a29baf54b7cf8def07d027d2fd4ef5daf54f0d01a8cd7bc89f6607
font_03_sfnt_off000097a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A1 10268 bytes
SHA-256: d618cae0fea862f16f70fde6c8cc5421ff5ab5d902dc01e3de526fb48d957725
font_04_sfnt_off0000badc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADC 17148 bytes
SHA-256: 7a344eb4d613886cef89f796561cb6c0c61bcc9bc854668344b98d8765ce9e27