Malicious PDF — malware analysis report

Static analysis result for SHA-256 3692e66216d9e21e…

MALICIOUS

PDF

41.7 KB Created: 2020-08-06 07:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9450de088bd882e9de387023e70e0dd SHA-1: 3be1c13a2901d1c55370fe05256af143a5b79215 SHA-256: 3692e66216d9e21e2ad5ce750c50bfacf93d49088d6839c962ec508986db5395
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Acquisition definition pdf' and the malicious URL. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to lure users to a harmful site.

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.com/pify?keyword=acquisition+definition+pdf
    • http://files.normanchildrenchorus.org/uploads/1/3/2/6/132681665/setufedumoparotojow.pdf
    • http://files.rina-bansuri.com/uploads/1/3/1/4/131406659/kitufaxaga_sidisetiv_vexikitafot.pdf
    • http://files.forwardpathcoaching.com/uploads/1/3/0/7/130739835/konunagup_pumuled_dezovew.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/21715406646.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/fedexiwofutadolovokepelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/poniweviwolifasorox.pdf
    • https://cdn.shopify.com/s/files/1/0434/8372/5990/files/it_took_me_by_surprise_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/52902788661.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/37811103255.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/economist_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/atripla_efectos_secundarios.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/bank_po_exam_material_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/tamolidajetewased.pdf
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/faniwulopozolix.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/44739312428.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/95460060842.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_off00006656.bin
ba8a07a87e9807d0737b6f9ef291af0777a59b0ef77456af071d8407c731382d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 4928 bytes
font_01_sfnt_off00007739.bin
16f318fa2c3044ff3adb609a1941470e5d821ddb08692e4e1f43ac62186fac12
pdf-font-stream PDF embedded font (sfnt) at offset 0x7739 10292 bytes