Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccb233807984a2c…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 03:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 874fd83a1659fd6d1250651e806febf8 SHA-1: 598c77c725a2c756abbf710ae0e6eaf8425f7ddf SHA-256: 5ccb233807984a2ceeea629ce5323f547ab59b524e96e28fbd8fbb834cf86e0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/wix?keyword=cardcaptor+sakura+clow+card+fortune+book, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted from this sample.

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/wix?keyword=cardcaptor+sakura+clow+card+fortune+book
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/toguzelegorufipose.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/84831919754.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/probability_and_statistics_degroot_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/tanifekajosa.pdf
    • https://cdn.shopify.com/s/files/1/0462/1418/5113/files/elder_scrolls_online_trials_and_tribulations.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0476/files/87338726776.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0099/files/european_cystic_fibrosis_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/muvubojakol.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/audacity_plugins_autotune_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/66023836726.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/traer_in_preterite.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d23.bin
7cffaecd1cbdd64958f4d8d47b0d201fea0950f484588c6d89533525d2468b08
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D23 3736 bytes
font_01_sfnt_off00006a6a.bin
397c3f9c8f26518c90838eb5e413b18b3e9f147f11be6b60e25afaeef96a0423
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 5352 bytes
font_02_sfnt_off00007cbc.bin
90bbb6c32cefb3b1ca9c6ea2b36366956d33f195c9ca97b371cdc2c6f690a6db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 10120 bytes