Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a675edf4ecda1e…

MALICIOUS

PDF

48.6 KB Created: 2020-08-19 04:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a336e42c2ff0e4636ac109312850d131 SHA-1: b99757c2acab612889e549bc01229706ce535a75 SHA-256: e8a675edf4ecda1e29129f016242c5d95439814b011f7f4976406690c51b2e9c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector and others forming a link farm. This suggests the document's primary purpose is to lure users to external malicious sites. The ML classifier also strongly indicated maliciousness.

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=insecto+chicharra+informacion
    • http://files.accoladeglobal.com/uploads/1/3/1/6/131637850/0a4c83f9d55.pdf
    • http://files.parketvloerenschuren.be/uploads/1/3/0/8/130814397/7653471.pdf
    • http://files.animalfineart.co.uk/uploads/1/3/0/7/130776381/5928508cbd278.pdf
    • https://cdn.shopify.com/s/files/1/0434/1569/9621/files/mawixedeni.pdf
    • https://cdn.shopify.com/s/files/1/0432/0198/6723/files/gutewitubojesuvelanipe.pdf
    • https://cdn.shopify.com/s/files/1/0459/9601/5773/files/tazufesojusitegefenizoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/51202138130.pdf
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/geluj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3010/8577/files/lolixupoxijutifulax.pdf
    • https://cdn.shopify.com/s/files/1/0454/2077/3544/files/vedic_astrology_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/50914147746.pdf
    • https://cdn.shopify.com/s/files/1/0450/1841/5254/files/3712077115.pdf
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/37941929611.pdf
    • https://cdn.shopify.com/s/files/1/0430/3516/4835/files/gemunevidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/assistant_short_form.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_off00007713.bin
daef9d4fdad54a8b7b2760bebe3eb2ff2dcb258592f31595de061d3d61a056f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7713 5024 bytes
font_01_sfnt_off000087f6.bin
3d0d7f30ee478c0e16950ad9a412eae99cf02f3ddca5d5e4f3d6c9903913d806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F6 14712 bytes

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