Malicious PDF — malware analysis report

Static analysis result for SHA-256 5834c9e44b5b5373…

MALICIOUS

PDF

62.3 KB Created: 2020-09-01 02:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb31e67c99f00b306d13b839fddb25f9 SHA-1: 8a2f3fc83650f32b63792f35ecc62cf78e9b7a2b SHA-256: 5834c9e44b5b5373c3562a3d3b172f007f1ccfafaab8811696ac870124679ae9
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a Cisco switch datasheet. The link points to 'ttraff.cc', a known malicious redirector. The PDF also contains a large number of external links, many of which are likely part of a link farm for SEO poisoning. The ML classifier strongly flagged this PDF as malicious.

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.cc/wix?keyword=cisco+catalyst+2960-+48tc-+l+switch+datasheet
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/baa_baa_black_sheep_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/0999/1075/files/ards_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0439/9159/7214/files/24969387299.pdf
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/kabbalah_magic_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/vanominasuloj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/dogar_books_for_navy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/wufakukitufim.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/dexadoxarobej.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/mvk_on_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/15041079111.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3143/files/rozedizilulamake.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/85487365809.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/cnc_drilling_machine_programming.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/lotusef.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/coroner_reports_sa.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/
    • https://cdn.shopify.com/s/files/1/0428/4468/4

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1f8.bin
dd4a972d678c5f18c69f868b5468117f697e9a51611d12bffb2af192d534e20d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F8 5928 bytes
font_01_sfnt_off0000b638.bin
ddf873e0f9896abce48b1ff584d6745c39f63c414914042eb25a80cb867c7479
pdf-font-stream PDF embedded font (sfnt) at offset 0xB638 16844 bytes