Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daeaf83a75c538f…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 06:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2c7fd2ad9d43693ffa5b70d46f8d32d SHA-1: 245c0e6af8847a9bb2775181ce2de99fd414829f SHA-256: 3daeaf83a75c538f4986a29a1bbe86ad0f09ff2c3f4d1d9243b88972cabebe3a
150 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a critical heuristic indicating it's a malicious redirector link. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.cc/pify?keyword=yellowstone+season+2+episode+guide, which is likely used to direct users to malicious content. The document body contains garbled text and metadata suggesting it was generated by wkhtmltopdf.

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.cc/pify?keyword=yellowstone+season+2+episode+guide
    • http://files.humanitiesnd.org/uploads/1/3/1/4/131408465/nopiwutizojewizuj.pdf
    • http://puvimib.liseofires.com/uploads/1/3/0/7/130738799/6391507.pdf
    • http://pageb.dancewiseforparkinsons.com/uploads/1/3/1/1/131163635/7c27af5cef5b.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/educational_trust_deed_format.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3392/files/xadulumotuwal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/xumirup.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/32242318710.pdf
    • https://cdn.shopify.com/s/files/1/0449/3528/2856/files/24477064756.pdf
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/vinasetulusotewewuvozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/the_miracle_of_self_discipline.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/lesexisojaxedozinaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/13628006607.pdf
    • https://cdn.shopify.com/s/files/1/0447/1151/0170/files/introduction_to_agricultural_extension_and_rural_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/as_artimanhas_da_excluso_download.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_off00007800.bin
97e7b81699dad1085e9c554d5942e26c764ba1276fb0d3dad507d53a9b431d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 5216 bytes
font_01_sfnt_off000089eb.bin
39e7033072701b1a20342c9d94c0c8c8abab878043621dcb31a8924824957f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89EB 10060 bytes

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