Malicious PDF — malware analysis report

Static analysis result for SHA-256 12743513e3eb3baf…

MALICIOUS

PDF

39.7 KB Created: 2020-08-03 16:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb1278a5a0ec9db08a4f0d3834146549 SHA-1: 378b8eb17c307b411bc86ef6abae919ee6a76497 SHA-256: 12743513e3eb3baf9865714b84339aa9fc98956a19443319f6795d73f50166d2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a tutorial PDF and the malicious URL, indicating the intent to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious.

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=creo+parametric+4.+0+tutorial+roger+toogood+pdf
    • http://mavaleto.yoloinbiology.com/uploads/1/3/1/0/131070718/4517138.pdf
    • http://files.sriyantrawatch.com/uploads/1/3/0/7/130740625/3341927.pdf
    • http://files.relationshipsartcollection.com/uploads/1/3/1/1/131164358/fareb-xotix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/7121967337.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/wuzatedof.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/xumesobidarigozixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/moboriwir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/jivoxorade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/weezer_say_it_ain_t_so_chords.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/miwiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/12761316320.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/3030499580.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/vufemibatebuzag.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/gapubivi.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_off00005754.bin
d47504b7df56f2eb92e3d98715521159e6e7326db64b22acbc866ae901f897cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5754 5464 bytes
font_01_sfnt_off000069df.bin
0884938882683f172ffe5abe225905c24b12a30ced7c5a4a4b4e14850e9d25b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 12148 bytes