Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00823ab46bcc940…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 09:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 173fe40c98d6ac6e0a5b536137713e08 SHA-1: 6c2c8563f2f0cc56f6309371e3f25bad72d908fa SHA-256: a00823ab46bcc94085ff842a7808432fb86c25912d97b9152f5e313d00d68fab
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This redirector is designed to lure users by appearing to offer "apple motion fcpx templates". The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is a malicious link farm intended to redirect users to harmful content.

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.cc/pify?keyword=apple+motion+fcpx+templates
    • http://files.disciplesofthemysterium.com/uploads/1/3/1/6/131606094/dameputazude.pdf
    • http://risax.pondersculpture.com/uploads/1/3/1/4/131453133/5398652.pdf
    • http://files.emilycarewwoodard.com/uploads/1/3/2/6/132683017/tobumekotimapimer.pdf
    • http://pawuzema.rachelseats.com/uploads/1/3/1/4/131453329/sifepil-buwusebusirijol.pdf
    • http://files.connoisseurstours.com/uploads/1/3/1/8/131857071/abaa266e7dc9a.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/4342304899.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/microbiologia_veterinria_e_doenas_infecciosas.pdf
    • https://cdn.shopify.com/s/files/1/0439/0263/2104/files/man_in_the_mirror_joyful_noise_sheet_music_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/96209220000.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/jelojunaropow.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/20122645545.pdf
    • https://cdn.shopify.com/s/files/1/0428/8233/4883/files/84004870009.pdf
    • https://cdn.shopify.com/s/files/1/0434/2674/2421/files/mavovekude.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1670/files/caractres_spciaux_clavier.pdf
    • https://cdn.shopify.com/s/files/1/0434/6780/0736/files/the_sooner_the_better_debbie_macomber.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/62831921971.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/cement_brick_making_process.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/vemalikaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/sexiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/35274857187.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_off00006f67.bin
5c9dc77e427b7aeedcca0ace044e7d5c50e6151779ebbf3c32877747951c570a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 5124 bytes
font_01_sfnt_off000080c9.bin
7ca3de1d6a1898e443d86e2b314d60c946c747257a325254305c45d3d8ac0164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C9 11168 bytes

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