Malicious PDF — malware analysis report

Static analysis result for SHA-256 097be10cb4a5926b…

MALICIOUS

PDF

50.8 KB Created: 2020-08-12 10:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3309483ffc1ebd01bf2a2ab4fa2ccac1 SHA-1: 424af3b47223c711c1875bb27494027e916b1e01 SHA-256: 097be10cb4a5926b79fb5cfe6579e165d2f918a694f8f0afaf5c472e17be089e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains lures related to payment and account opening, aiming to trick the user into clicking embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=account+opening+form+of+sbi+pdf'. The document also contains a large number of other PDF links, suggesting a link farm or redirection strategy. No scripts were extracted, but the presence of malicious links and lures indicates a phishing or redirection attack.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/pify?keyword=account+opening+form+of+sbi+pdf
    • http://files.ridleyea.org/uploads/1/3/0/9/130969334/3ac703fa.pdf
    • http://files.aquarianlibrarian.com/uploads/1/3/1/4/131406807/e19f8cc22a300d.pdf
    • http://files.somosescritores.com/uploads/1/3/0/8/130813054/metagaxinevakuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/84754051152.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/22933019736.pdf
    • https://cdn.shopify.com/s/files/1/0431/5886/4028/files/vumifizuwarulum.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/49716533145.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/63001280896.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34803766861.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/nuvajepik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/2145158092.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000890d.bin
28fa11653fb828abd2cd26a637a9bd9c61ff92dacdaffd3f18514bfa91b856f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890D 5360 bytes
font_01_sfnt_off00009b30.bin
534aee0cab3a769484ffa3b593e4e6d6a4997326c99d5ef1929798f4e799d641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B30 10488 bytes

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