Malicious PDF — malware analysis report

Static analysis result for SHA-256 421306eeb622cc15…

MALICIOUS

PDF

43.3 KB Created: 2020-08-05 02:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0cb49b44be3c6ccbe9cf7b09a91a82f SHA-1: 109b57e277e29fdf5fcde292dd093fda9355417b SHA-256: 421306eeb622cc15896f1b9982189ef4ef36505a3c96a9bdece082e969c800d4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=convertidor+anal%25C3%25B3gico+digital+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, with a significant portion hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=convertidor+anal%25C3%25B3gico+digital+pdf
    • http://files.latechhub.org/uploads/1/3/2/6/132681749/kojesisuzabid_kabevatufuxex_ganurono_fapamizedoto.pdf
    • http://files.amandadavisart.com/uploads/1/3/1/8/131871414/ruwiz_bisitafijinesad_zovujez_futanuxuzolem.pdf
    • http://files.rayzinktattoo.com.au/uploads/1/3/1/4/131453177/korugiviwujepaseb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/53351165540.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/zotenukibebipowimobeger.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/98234709383.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/kevexisig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/velas.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/kufazeroguxorukux.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/39950860208.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/61136909767.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/zobateniwojus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/datesomesubufozotepuxexan.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_off000068bf.bin
ab4640a0091fe4f088e448c883819336e513abc8983780a3a0b4d94221b0e1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BF 5244 bytes
font_01_sfnt_off00007a73.bin
62c232ed373f1ad91a52a367fc2d7261114b6c704933c52d336146db4321f525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A73 10972 bytes

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