Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec7fdbb5e954855…

MALICIOUS

PDF

47.8 KB Created: 2020-08-05 06:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e23519abd271b98812573e84423048f5 SHA-1: 7687f3f0599e27a392ffc19d6ccde3be667f452e SHA-256: 8ec7fdbb5e954855529725b6521e0d2932e537316440987501880fa9559c6d8a
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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=benefits+of+agroforestry+practices+pdf
    • http://files.addicted2sugar.com/uploads/1/3/1/6/131637055/43171a26486cee.pdf
    • http://files.kadvise.net/uploads/1/3/2/7/132740639/jemukedugat.pdf
    • http://files.jonathandearmusic.com/uploads/1/3/1/0/131070327/bopofokejepugow-vaxowabam-bizizomifiduror.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/82517143559.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/pusuwoxuxerurawesekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/90164563087.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4022/files/tutorial_netbeans_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/black_belt_karate_the_intensive_course.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/xirakuzisigixol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6377/0274/files/dedoxatozuzedefatoxuxoven.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/wawixitedoxezokakefora.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/rotugixag.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/53792407959.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/saints_row_3_cheats_pc.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_off00006fc1.bin
5ab32a2049ebf5252e9e7ee8e1c94b91286283c2884cd455b99e39a663f4a395
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC1 5228 bytes
font_01_sfnt_off0000819f.bin
f3ea3fab28f699d118d21d96eacf62d37f470f1709f6800c75f2f822fddbf3c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 10080 bytes
font_02_sfnt_off0000a440.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA440 4324 bytes