Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f83dbce468e69d6…

MALICIOUS

PDF

58.1 KB Created: 2020-08-14 03:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 817d5a6813ca7e1ca99d2508af848537 SHA-1: b207de68315810932a55bc13d388de7df92ec9c2 SHA-256: 1f83dbce468e69d61194c420ee064d863a547b73edd8bbecd360aebbdad29600
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=completion+letter+format'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on platforms like Shopify and other unknown domains. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure to a malicious site.

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=completion+letter+format In PDF document text
    • http://files.infosphereab.com/uploads/1/3/0/7/130776152/4747287.pdfIn PDF document text
    • http://files.nancyives.com/uploads/1/3/2/6/132695492/rerawa-gijotiwuzumemuk-popebagoni-rimejokodu.pdfIn PDF document text
    • http://files.sbph.ca/uploads/1/3/0/7/130775503/mugug-refatowu.pdfIn PDF document text
    • http://gedulu.brookes.edu/uploads/1/3/1/3/131379732/somekotit_zizojifirum_jefebuxufo_ponerowowutifin.pdfIn PDF document text
    • http://todoli.turningpointbc.org/uploads/1/3/0/9/130969596/4aff58.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/1/0429/6497/5765/files/totiwanamovuramonupezete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/canaliform_dystrophy_nails.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/74703084528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6759/5169/files/anglican_hymn_book_ancient_and_modern.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/63526731173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/domowaxutifitugosazor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/gepinedom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6991/4790/files/45833094232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/gogonewanaziwuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/85279195537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/75999315104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/93948763425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/zevidixasepuf.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_off00009e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2B 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off0000a825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA825 4772 bytes
SHA-256: 8efd2c1c92c8b5b7ec9c896c6155119c4b075af533582b7edfdbd4122e0ce287
font_02_sfnt_off0000b840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB840 10024 bytes
SHA-256: 119768f841fa52743869d23b3d556ffdf65bc34c247ec7d7abed389518df7a3a