Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ec360395c6e404…

MALICIOUS

PDF

44.4 KB Created: 2020-07-28 03:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 193eee5a1bec8d52eaefa47de7c28211 SHA-1: 0d3a1e999101b2f6faa4419e8ee20017cf9bae22 SHA-256: f3ec360395c6e404a990c4104bcc76ff5cf3559a6f2352ab0faff5c403dabc4f
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, with one specifically identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text related to translation and application metadata, suggesting a lure document. The primary attack pattern involves directing users to external, potentially malicious, content.

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=avoir+la+forme+traduction+anglaise
    • http://files.cosmicsistershop.com/uploads/1/3/0/9/130969364/8126109.pdf
    • http://files.kocanada-usa.com/uploads/1/3/1/4/131437538/zorodoke.pdf
    • http://files.irisfelix.com/uploads/1/3/0/8/130814014/3176479.pdf
    • https://cdn.shopify.com/s/files/1/0438/3031/3122/files/vepilasuxofux.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/bajokiloril.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/3001007355.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/90592600039.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/78156104778.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/tuzuduzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3166/files/bajemudodexuzuwarexop.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/75101941401.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/koruxakanob.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4443/files/10877510987.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/5737794135.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/22345260020.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a02.bin
3447ddec2aa1c8edc57bc65c03ac48b5a84fb9a749decede94a8d0a2e0ff5dd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A02 5272 bytes
font_01_sfnt_off00007bde.bin
b656cb0d3586b90904f9c492707f599034522e61491b0f1ce857bdaabb59e3c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDE 12568 bytes