Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e462b23fba8c969…

MALICIOUS

PDF

47.8 KB Created: 2020-08-16 23:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ce21b5c77e558d1e86e718848e13e03 SHA-1: 0392728ee62686cf918029f3ddc94584c50109ea SHA-256: 5e462b23fba8c969cac3c2e66ec28cf95632843a4fc4151d660e72182ac1fcc6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical redirector link pointing to a known malicious domain, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Hiv treatment guideline myanmar' and the malicious URL, suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of malicious links and the heuristic firings strongly suggest a malicious intent.

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=hiv+treatment+guideline+myanmar
    • http://salekozu.tampacommons.com/uploads/1/3/0/7/130739415/sejoj_tugirevoselago_wixigikaxox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/56738816323.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/android_install_burp_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/xakatupinikog.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/978118298.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/varaxutuxivu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/xiriwunudinaraverebun.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/hpu_m._ed_date_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/java_default_parameter.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_off0000708d.bin
a9b856e95d2b973fdbcaa1b4d3935d9e890d8f789d262bceb5bcbe1ccf62f44c
pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 4864 bytes
font_01_sfnt_off000080f3.bin
0e8636bc92be9a3e47b41e244e0d00ab6d89c197c74dc63bd46ae7b2644eaa57
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F3 10244 bytes
font_02_sfnt_off0000a402.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA402 4324 bytes