Malicious PDF — malware analysis report

Static analysis result for SHA-256 282aab3e8ad1f1a7…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 05:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c96e5049a01db03d47d9de8fb0da20e SHA-1: 3796a413e248629e84418c7a6387af0499a9cebb SHA-256: 282aab3e8ad1f1a7504ae6ff2c037b8a68fdf827ce31586d560b559df93d17fe
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm and a malicious redirector URL, suggesting it's part of a phishing campaign. The heuristic firings indicate it's a lure for invoice/payment information and potentially MFA harvesting. The embedded URLs, particularly the malicious redirector at https://ttraff.ru/wb?keyword=tds%20form%2016b%20download%20pdf, are the primary indicators of malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=tds%20form%2016b%20download%20pdf In PDF document text
    • http://files.fdmolinares.com/uploads/1/3/0/7/130739982/6257038.pdfIn PDF document text
    • http://giwuked.nonstopfunsocal.com/uploads/1/3/1/4/131454065/b5b0c39c2ab7.pdfIn PDF document text
    • http://files.ccfnei.org/uploads/1/3/0/9/130969742/nozud_pezagejuvu.pdfIn PDF document text
    • http://bibunik.thedragonslibrary.net/uploads/1/3/1/4/131437823/8218317.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/1/0434/9257/3334/files/theileria_in_cattle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/5192102186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/visio_2010_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6245/files/xokibawexujetudewexoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/duweloxuwusaterotilibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/17615967590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/34039775749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/gigiwajap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/8557430465.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
🗂 Part of campaign: casa-collective.com 10 samples

Related samples 8

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_off000067d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D6 5576 bytes
SHA-256: eeaeaf2596b923531518529c5dafa6e0d19a174b7da4e0f86e9d62aa46f8a5bd
font_01_sfnt_off00007ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 10180 bytes
SHA-256: 472539dd0a2e23d273db91200f282e562f74f1fb2ddd58b8bd515d50c4ec200d

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