Malicious PDF — malware analysis report

Static analysis result for SHA-256 80527b2331195fee…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 14:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85f9185c811308c657de54ca42056e07 SHA-1: 65e21614df84d39da757d66f1955143ed8799908 SHA-256: 80527b2331195fee00b4f100821562a4476175f2810a620e648411ea001f39d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to 'ttraff.me', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to '4liker insta apk', suggesting a lure for users seeking social media tools. The presence of numerous external PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to distribute the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/wix?keyword=4liker+insta+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/02beb7_b21ddbfe5a9f4faa9a885929b4bb760e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f98010e7f1a449c86d15ffb029b3a66.pdf
    • https://static.usrfiles.com/ugd/0a052f_778e58c63fa740f1a82f554d8d70b729.pdf
    • https://static.usrfiles.com/ugd/73cb9e_6a93d4f1f18f4640bf9484b0badd0441.pdf
    • https://static.usrfiles.com/ugd/b8c837_adf1e05142ca4a52861a99efe5ed1804.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/runir_2_fichiers_en_1_seul.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/kerarenoreluwapemizodaf.pdf
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/google_maps_live_tracking_api_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/modal_verbs_worksheets_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8439/files/david_weber_uncompromising_honor_epub.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5171/files/vixatiwoxefowikasoranele.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/21777758715.pdf
    • https://cdn.shopify.com/s/files/1/0435/5774/8897/files/mubavufaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/desumabog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9990/5429/files/jadwal_performance_saung_angklung_udjo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/house_cleaner_job_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/25853208354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/change_to_editable_word_online.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_off000063a9.bin
47bff04a3a8d8f346419ebaebf8099741f27cb0bb51745886af3d6d7f72c917b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 4872 bytes
font_01_sfnt_off0000744c.bin
7032880c03daf90fa76157447108d5493aa41e82f593c42ca84bd97d685975a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744C 10356 bytes

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