Malicious PDF — malware analysis report

Static analysis result for SHA-256 7595fdf7ccd362a2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 02:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8cbd6c0330fe7e16e13c0549c855b05 SHA-1: 7b0dc9992db84cf13c3091e87ce618d273c42ed5 SHA-256: 7595fdf7ccd362a26ba80b57142bd4fd11a8976fd3f0f3886ff214a6d23bc80e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources disguised as legitimate documents. The primary malicious link, https://ttraff.com/pify?keyword=noodle+box+nutrition+guide, is identified as a redirector to malicious infrastructure. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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=noodle+box+nutrition+guide
    • http://files.sheltermusicboston.org/uploads/1/3/1/4/131406173/serulox.pdf
    • http://files.phoenixtattooandwellness.com/uploads/1/3/0/7/130776607/nagav.pdf
    • http://dopuzuzu.shantibirthservices.com/uploads/1/3/2/6/132681556/simuverufaram.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/dodesavomikunimidiwubiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/gurapa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4058/files/alkanes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/numafajogevoregivosofevot.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/btelinx_exam_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/equivalence_class_partitioning.pdf
    • https://cdn.shopify.com/s/files/1/0447/7878/2869/files/nutrition_information_kellogg_s_rice_krispie_treats.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/blades_in_the_dark_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/vimurizubuwugenizuzafusuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/37681310588.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_off00006cc5.bin
96341ca70dc3cb46724a7e6a3ec65935f8b8b2c876844630a95095d7b40e7a54
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC5 4784 bytes
font_01_sfnt_off00007d1e.bin
51d7bbf1349e7047664534a38ca21b06ea32a99c156ce967302ce69fc970a38c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1E 10392 bytes