Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac98bdc723d47e05…

MALICIOUS

PDF

35.8 KB Created: 2020-08-18 21:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04ae574af3692e565b01a898be84ea8 SHA-1: 0b483abc5e901ef93ebf2a33f5bb072af2abdcf6 SHA-256: ac98bdc723d47e05a862cf819c33434a25abb71ce9d77364d4b9fd727fd375cc
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one to 'ttraff.com', suggest a redirection to a malicious site, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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.com/pify?keyword=dremel+binding+router+guide
    • http://files.ambitiouschics.com/uploads/1/3/2/3/132302749/fec933fd08f3194.pdf
    • http://resora.recrates.co/uploads/1/3/1/3/131381679/rowezovefomo_ledapofi_jerukedawur_fegosefupaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/19362671172.pdf
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/244128173.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/el_cristianismo_en_la_edad_media.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/topographic_map.pdf
    • https://cdn.shopify.com/s/files/1/0459/2238/6069/files/90463426039.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/certificate_of_completion_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/10477599489.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/mikumimibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/sinubevomuvaxawuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/relilasokivamizorosub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004224.bin
6ee9e7429324e5a7866505084d688d1ed7b4aaa02a28dc799adb5d59b17d0285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4224 4776 bytes
font_01_sfnt_off00005240.bin
2cea041a58b82225cc465431633472b87f7a1f275c409a8e43dfecf841abe9ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5240 10080 bytes
font_02_sfnt_off000074ca.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 4324 bytes

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