Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1843ae2ed37df8…

MALICIOUS

PDF

44.3 KB Created: 2020-08-07 15:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69d27526b787898f9fd470c8379877e SHA-1: d636bb6afb0906879beeca77b785723f511125ba SHA-256: ce1843ae2ed37df8bf9d06d335101a1e0379d267fef46c86bd008f7c56b1860c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to lure users to this malicious site. No scripts were extracted from this sample.

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=diet+after+gallbladder+removal+long+term+pdf
    • http://files.myrossbush.school.nz/uploads/1/3/2/7/132740424/xeronolivafup_novasowuza_dewinig_damarivilaveb.pdf
    • http://gexifapol.leetech-led.com/uploads/1/3/1/4/131482995/1147419.pdf
    • http://files.dawnsgoddessdiaries.com/uploads/1/3/1/0/131070674/womugawimexif.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/2007_gsxr_600_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/degojididujesun.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/midewugal.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/64922366724.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/bivovajudike.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/27713153030.pdf
    • https://cdn.shopify.com/s/files/1/0439/7475/4462/files/wigiferaniribenexeg.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/68674597978.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/13224629805.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/nezabe.pdf
    • https://cdn.shopify.com/s/files/1/0452/1220/5216/files/online_watermark_remover_from_images.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/74831113118.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_off00006f5a.bin
0492df560918a05b08a5ec197a8303bdead7806df890037f5d173ae7fbe12690
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 5384 bytes
font_01_sfnt_off0000819d.bin
f7c4e12891449a1a65ae87f90869f4a708cb9607bd1cc6b1ff2fe8a3487fb3b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x819D 10176 bytes