Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d460cce971c0bd…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 08:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b2e8b917bda13fd9d9af647902e2005 SHA-1: 7413295d4c142fba721db6adbd5dbb40c1a89dc2 SHA-256: 69d460cce971c0bd25643c7d93b1b2de65e5aea54b5ddd65495110568414821b
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a digital multimeter manual and the malicious URL. The presence of multiple external links suggests an attempt to direct users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the ML classifier strongly indicated maliciousness.

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=cen-+tech+digital+multimeter+p37772+manual
    • http://files.selfadvocacyandstrength.org/uploads/1/3/2/6/132681694/195ce.pdf
    • http://files.lauraavnaim.com/uploads/1/3/0/9/130969819/0ec2ee5.pdf
    • http://files.starwarsjournal.com/uploads/1/3/1/8/131856705/d4ecace2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/47336928082.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/taxiferu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/96259683415.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/43871492654.pdf
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/73093410699.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/uninstall_node_js_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/luloga.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/74711609752.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/lawufivonigogupasuwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/58288682480.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/83022505015.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/2099615017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fdd.bin
fcd2f1feef7dc82645551f6670f3594d194790867f092b7a4f489c35e8ab19f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 5624 bytes
font_01_sfnt_off000072df.bin
a44760486f8d951f499d5d75128473943d1ebe0cdcdfee8c5a2fee31dd888139
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DF 9572 bytes