Malicious PDF — malware analysis report

Static analysis result for SHA-256 754bcc84864c9e95…

MALICIOUS

PDF

51.8 KB Created: 2020-07-27 12:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f607a3e25d6accbf0362e0f60199891c SHA-1: ca5263fdf00706c29381bc9921c6876e23935bcf SHA-256: 754bcc84864c9e9525cb04c5f1617615958f383f444bc65767b43a5c45c6be7e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to external sites, potentially 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.com/pify?keyword=bol+chudiya+bol+kangna+dance
    • http://files.mobileplantmanagement.com/uploads/1/3/1/4/131437249/2171071.pdf
    • http://files.steeplejam.co.uk/uploads/1/3/1/4/131453054/dutiviseli.pdf
    • http://files.marcosallis.com/uploads/1/3/2/6/132681713/6496127.pdf
    • http://files.qcstriders.com/uploads/1/3/1/3/131378932/4731494.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/dineboresifemovasakika.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/wibaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/golokulebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/nodoxiwokef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6629/files/majimumuwegonisexazosazid.pdf
    • https://cdn.shopify.com/s/files/1/0432/6234/5384/files/tadovofixegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/18715009927.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/tojabefesopugaferapuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/78771829481.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ffc.bin
89e38fdc2740404869a1fe7052a2075b1163c841ec197ef4e16fda079f540b72
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFC 5084 bytes
font_01_sfnt_off0000813a.bin
c7a6d3064179be1e2c97513b0b76938be4d8460037b45664383d4febe06f32df
pdf-font-stream PDF embedded font (sfnt) at offset 0x813A 13928 bytes
font_02_sfnt_off0000ad03.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD03 16164 bytes