Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c57e74b31e49de…

MALICIOUS

PDF

69.1 KB Created: 2020-08-15 02:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19351be8d908f38e82c5a9b4e867e765 SHA-1: e0bfc87864b6de1393babc07266e425193436b25 SHA-256: d0c57e74b31e49de9bec3aab41f3de31d1127e67493a901667b5c3faa897db28
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=d%2526+d+5e+fighter+level+guide', redirects to known malicious infrastructure, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=d%2526+d+5e+fighter+level+guide
    • http://golotulik.morrinsvillecountrymusic.com/uploads/1/3/2/8/132814930/xekezika-vokubiz.pdf
    • http://files.maplebrookschool.org/uploads/1/3/0/9/130969529/6446797.pdf
    • http://dunojikex.kathleenokeeffe.com/uploads/1/3/1/6/131637814/wulepekinovarabapop.pdf
    • http://files.deshlerchamber.org/uploads/1/3/1/4/131438869/fedudumobagume.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/78250697887.pdf
    • https://cdn.shopify.com/s/files/1/0428/3088/9126/files/30502051628.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/52805940245.pdf
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/vedusajujuvilamelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/35865998651.pdf
    • https://cdn.shopify.com/s/files/1/0435/4224/9631/files/84297207580.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6792/files/arduino_bluetooth_module_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77650869017.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c60.bin
dea69edc3617924ddd2ea7a2dad42168437cc0f9b5f05654bc8089d7be019e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 6596 bytes
font_01_sfnt_off00007ca4.bin
b72324bf9fb2f960ad531a0c7fe13c100795e1c8b461db9e4f4d6c8496002b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA4 3148 bytes
font_02_sfnt_off000087e3.bin
d205a490ce0ef3b0e7eb7c8b3402073d1e4a99c72674db49f9e1e12afddcc9d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E3 4156 bytes
font_03_sfnt_off000095d0.bin
9f47aa96527d7b55db2a44687777893b4fcb5954852002f82c140ab43f2d3994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D0 6224 bytes
font_04_sfnt_off0000a4f7.bin
7b213cbf4b44e8c79d943aeba00e448faf4c1d3a595747e81720774f170b94d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F7 20864 bytes
font_05_sfnt_off0000e13a.bin
8f84ecd7f75584380f617f581aa08df766b27c320f4bc8b0aab0b4efe21da0ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 16304 bytes
font_06_sfnt_off0000f6fc.bin
ba170bb474b40190d9812ea6fa89a7109fc11a1f35ae9fc602080c752cac96c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 6096 bytes

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