Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf0f3d41d004464…

MALICIOUS

PDF

39.9 KB Created: 2020-08-20 22:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 180fa544f5a04dcca956024389948ecc SHA-1: f1b586d20df03940722a24e94e1efaac19c5098c SHA-256: fbf0f3d41d004464b970f9c27dc4eae7370e4734e811c1f52480183309c55cb8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to shopify domains hosting PDF files, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=educating+psyche+reading+answers+mentor', is flagged as a malicious redirector. This suggests the document is designed to funnel users through a series of redirects, potentially leading to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=educating+psyche+reading+answers+mentor
    • http://files.spiritenergymedicine.com/uploads/1/3/1/4/131407148/263b2.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/nikola_tesla_my_inventions_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/administrative_law_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/dopejuzawaritogejokate.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/dogaripanuliber.pdf
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/89661640302.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/wesitob.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/jalaxirukereraf.pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/baby_song_dance.pdf
    • https://cdn.shopify.com/s/files/1/0430/6806/3895/files/60587009843.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/7517980129.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/58833915675.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/3428715716.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_off00005fd7.bin
1a8ab7563375a65d21f928558425ccad49bb21f1d0b9cb02a79e9523ff13bac2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 5604 bytes
font_01_sfnt_off000072d1.bin
922e40687dd59bd66ef7437f0fdb6da9a99de90fc45dbbc3a0c2ff6b769e62dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 9468 bytes