Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe14d145198fa88…

MALICIOUS

PDF

42.9 KB Created: 2020-08-17 12:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb73d3f36e074a69b0dccc86c29c01d SHA-1: 69ef90c9bbcdb769045b81e450b09c2652259920 SHA-256: cbe14d145198fa884411ff76ffbf655ce3a2c076325b90d954f4222df3fcbe86
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves a link farm designed to redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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=pestel+analysis+pdf
    • http://files.benewahhumanesociety.org/uploads/1/3/0/7/130775675/mosagofozifozu_dumes.pdf
    • http://files.clubsaustralia-industrial.com/uploads/1/3/1/0/131070501/3356479.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/odf_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/naxwaha_af_soomaaliga.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/fujikexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/363109799.pdf
    • https://cdn.shopify.com/s/files/1/0430/0108/6111/files/picsart_old_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/1756037847.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/cambio_climatico_para_el_desarrollo_sostenible_libros.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/popowowig.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_off00006a1f.bin
c576438154c78eebd6d1c3af0a1a017857141394b9b42372927ffcd64bc4816d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1F 5040 bytes
font_01_sfnt_off00007b63.bin
60ac3ba2c7e4935db861448b63f63e84d091df5ee113c25b880fa2426e52f76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 10636 bytes

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