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)
MD5: 3c96e5049a01db03d47d9de8fb0da20e SHA-1: 3796a413e248629e84418c7a6387af0499a9cebb SHA-256: 282aab3e8ad1f1a7504ae6ff2c037b8a68fdf827ce31586d560b559df93d17fe
168 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.

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.
  • 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
  • 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
    • http://files.fdmolinares.com/uploads/1/3/0/7/130739982/6257038.pdf
    • http://giwuked.nonstopfunsocal.com/uploads/1/3/1/4/131454065/b5b0c39c2ab7.pdf
    • http://files.ccfnei.org/uploads/1/3/0/9/130969742/nozud_pezagejuvu.pdf
    • http://bibunik.thedragonslibrary.net/uploads/1/3/1/4/131437823/8218317.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/theileria_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/5192102186.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/visio_2010_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6245/files/xokibawexujetudewexoze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/duweloxuwusaterotilibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/17615967590.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/34039775749.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/gigiwajap.pdf
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/8557430465.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067d6.bin
eeaeaf2596b923531518529c5dafa6e0d19a174b7da4e0f86e9d62aa46f8a5bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D6 5576 bytes
font_01_sfnt_off00007ac5.bin
472539dd0a2e23d273db91200f282e562f74f1fb2ddd58b8bd515d50c4ec200d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 10180 bytes