Malicious PDF — malware analysis report

Static analysis result for SHA-256 0252e273159bd6b6…

MALICIOUS

PDF

41.6 KB Created: 2020-08-24 10:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df22ab792267e0408e948f78867ee4c5 SHA-1: 3e2c9bc528f8eb52ec4c47202e38b7261753b104 SHA-256: 0252e273159bd6b6d15620809a9239932058834cde64217153a63a7915e5e277
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a redirector to malicious infrastructure. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into financial fraud. The presence of embedded URLs and the link farm indicate an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=avant+browser++for+android+free
    • http://files.summerconferenceportland.org/uploads/1/3/1/4/131453560/956c24d227.pdf
    • http://files.silverleavesca.org/uploads/1/3/1/8/131871864/pisunipuxi.pdf
    • http://files.brianabrahamactor.com/uploads/1/3/2/7/132740865/miwutimelafutopexor.pdf
    • http://files.sdgphoto.net/uploads/1/3/0/7/130739016/81c7c81.pdf
    • http://files.claudechandlerartist.com/uploads/1/3/2/7/132740399/lixobenal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/the_american_pageant_14th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/jifenapufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/17878951864.pdf
    • https://cdn.shopify.com/s/files/1/0432/8321/8588/files/articles_on_education_system_in_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3944/0543/files/ese_veneno_irresistible_alessandra_hazard.pdf
    • https://cdn.shopify.com/s/files/1/0428/3750/8252/files/simple_android_app_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/kesulitan_belajar_bahasa_inggris.pdf
    • https://cdn.shopify.com/s/files/1/0451/9854/0949/files/bible_journaling_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/age_of_war_empires_3_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/803759518.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/conditions_of_marriage_in_islam.pdf
    • https://cdn.shopify.com/s/files/1/0436/9829/0856/files/pojigezufutalo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/golang_chat_server.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642c.bin
60b1f53492bb0c95c9048efb77d6d7c20d8a72828dcdb3868afd9aef1348f1cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 5152 bytes
font_01_sfnt_off000075d0.bin
e307181a4e5a363a84a30693836ca0ec33737e7530bf453f42273e7002787c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 10440 bytes

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