Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2d8f2f37f466f8…

MALICIOUS

PDF

49.9 KB Created: 2020-08-10 09:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 302f0537dd85d88aca10f2e074412db2 SHA-1: fe155c9aa3fdea28e38028a0aca491e1ef38e35f SHA-256: cd2d8f2f37f466f83bcf4aa44b910444e3b6533f1f4e9ba24275e02b05a72a89
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or link farm tactic. The primary malicious URL identified is ttraff.com, which is known for redirecting to further malicious content. While no scripts were extracted, the sheer volume of outbound links and the presence of a known malicious redirector indicate a high likelihood of malicious intent.

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.com/pify?keyword=idioma+kaqchikel+pdf
    • http://files.hardtofindprops.com/uploads/1/3/1/4/131453657/rumuzed-doterowi-zulegijapuroj.pdf
    • http://worakere.questalpacas.com/uploads/1/3/1/3/131398140/muxusajapibi-mikisoniwula-xejire-vuwugan.pdf
    • http://files.smartrevivemobile.com/uploads/1/3/2/3/132303229/8755340.pdf
    • http://jamusesu.ocbackgammon.com/uploads/1/3/2/6/132682883/5133197.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/kabirawopomamotajubenivo.pdf
    • https://cdn.shopify.com/s/files/1/0446/6409/4873/files/berliner_platz_neu_1_intensivtrainer.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/mosaicos_6th_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/45852352401.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/sheet_metal_bending_machine_design.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/espectro_de_absorcion_atomica.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/84303296416.pdf
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/5434699320.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/advanced_life_support_obstetrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xuvoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/39245848591.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/81150913468.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/atto_disk_benchmark.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/professional_baking_wayne_gisslen.pdf
    • https://cdn.shopify.com/s/files/1/0436/7443/5737/files/tb_treatment_regimen.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_off00008570.bin
916ffca863d7e1310c6545f765820782da11b3bd481f8a9832c3c7a9fe7c0e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 5248 bytes
font_01_sfnt_off00009729.bin
b833184f6fd1310ae65c2c531480eeaf025b9d9f2fd3068de4ab2689d7004a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9729 10336 bytes

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