Malicious PDF — malware analysis report

Static analysis result for SHA-256 33822cb55750c516…

MALICIOUS

PDF

67.0 KB Created: 2020-08-05 00:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc45986649b6e2f86980a29e532d9d10 SHA-1: fa46963cf2e66cdcc1cf514920338adb67354ba3 SHA-256: 33822cb55750c51667d61ff8366db983ce9a6931b9aee0ecb177d556f7fb1ae6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the target of the lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to a malicious site via the embedded link.

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/pify?keyword=algebra+2+equations+pdf
    • http://files.cakesncupcakes4u.com/uploads/1/3/0/7/130775537/2928104.pdf
    • http://files.tribenuktia.com/uploads/1/3/1/4/131453177/punixomajimow.pdf
    • http://files.gamecreek.com/uploads/1/3/1/0/131070362/buwajukojitumud.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/75997441266.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8487/files/25038060522.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/zelatulovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/9686208098.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/magibovif.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/84519808037.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2650/files/sawuxakudum.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/75044434812.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/68398964382.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/35705183026.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/godesezegovoder.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/unordered_list_html.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/endocarditis_infecciosa_diagnostico.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/67286243955.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7be.bin
b2c17acae3cfc79e64b49114c95edd249d412f0ed9f201d57fd3c558970f15ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BE 5596 bytes
font_01_sfnt_off0000bacd.bin
bd8796ad03dce446a49a2b9e1eac06e7c12a7f8cb35d616910f416b9025182e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBACD 14920 bytes
font_02_sfnt_off0000e971.bin
15c1f87e8df112c5056ebb5dec6b4b29aabc1c44ffab3fb10bec9297057c06bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 16180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.