Malicious PDF — malware analysis report

Static analysis result for SHA-256 2186c03ee800c832…

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 14:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f44d4742ba0a22410e5cfb18142b806 SHA-1: 599b8b852ee024805880e89ae9b102dd352f3ded SHA-256: 2186c03ee800c832828dfbae19e970bf0a03b05ae50beaab5de97826399c99c7
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with one pointing to a known malicious redirector. The document body text and embedded links suggest a lure related to 'Ar-15 magazine loader', likely intended to trick users into visiting malicious sites for phishing or malware distribution. 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=ar-+15+magazine+loader
    • http://files.markpcullen.com/uploads/1/3/1/4/131437380/0e2b6786fec.pdf
    • http://files.lilmissrealtorsherry.com/uploads/1/3/1/0/131069832/towebanotinow-fomijexix-lotuxorejubol.pdf
    • http://files.mtbo-commission.com/uploads/1/3/0/7/130775382/nowurafa_vafinikodebuwi.pdf
    • http://files.lancebyreferral.com/uploads/1/3/0/9/130969061/ebb6224.pdf
    • http://files.sheldonxink.com/uploads/1/3/1/4/131453302/gosozekexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/28492882006.pdf
    • https://cdn.shopify.com/s/files/1/0437/2958/4282/files/13072767063.pdf
    • https://cdn.shopify.com/s/files/1/0437/3273/0008/files/kikobil.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/pejaxoge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/fufameziwateduxutixo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/rinojotevirege.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/wojinoxexegutudir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/precalculus_dugopolski_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/kivufemet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89186344985.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_off00005bdc.bin
8633622a9cb5390d7579e9231760c354a49f237194ecb6837394809c850f7c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDC 5216 bytes
font_01_sfnt_off00006d91.bin
7683baf678265ef86f97788a2512b029234f613270c290cb072914f8ced1647f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 14660 bytes

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