Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2aaaf587581507…

MALICIOUS

PDF

67.5 KB Created: 2020-08-12 18:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2509c026e0a2ce85ad43ef5ca4170e64 SHA-1: 2936d7e68006a06c9a660e313c39892f5eea4298 SHA-256: ea2aaaf58758150784f8082dc2d65b9f970ab95b07bbc0d5130a0ba5986375ea
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, specifically ttraff.com. The document body, though heavily obfuscated, contains text referencing 'Calculus anton 10th edition solution manual pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy to improve SEO and distribute the malicious payload.

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=calculus+anton+10th+edition+solution+manual+pdf
    • http://files.peterjenningspoker.com/uploads/1/3/1/0/131071063/347e5e5b.pdf
    • http://files.kidfoodiecolumbus.com/uploads/1/3/0/8/130814935/baxodolipego-vetoxuro-denire.pdf
    • http://files.shop120southmain.com/uploads/1/3/0/9/130969703/a76b3e5b252.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/9167104003.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/grade_12_physical_science_textbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/wuvuni.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/absa_premiership_fixture_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/73615343783.pdf
    • https://cdn.shopify.com/s/files/1/0432/6909/5590/files/master_algorithmic_programming_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/el_negocio_de_bienes_races_en_mxico_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/dolezawujigijagukima.pdf
    • https://cdn.shopify.com/s/files/1/0440/3773/4550/files/asma_ul_husna_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/separation_process_engineering_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/epilepsia_causas_sintomas_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/literary_elements_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/whataburger_application.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1ba.bin
258180a7a0e8e5e27665128e2cd2f33b61e3b2e62a0f7ab97fcccc34cb045ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BA 5400 bytes
font_01_sfnt_off0000b3e7.bin
8b4724f9b81c9da39ff0e9764775da20bf907c3087930fc5a6f551d2b3f58341		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E7 2184 bytes
font_02_sfnt_off0000bd45.bin
575b743faad3a0e73020f329fa0de8a2e86fb1be73012cfbc3878452952c6809		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD45 14316 bytes
font_03_sfnt_off0000eb2c.bin
2ddf0fc0cc55c5b6d5f3f9ce654b23e6ac7c2068389cef1bf5b6d91ec0505483		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 16140 bytes

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