Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e2eeee49aa3a72…

MALICIOUS

PDF

45.0 KB Created: 2020-08-23 20:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52d73a80db238061aff59fdce257026a SHA-1: f176810fad378af04e2bdd286e35797c4d3b2510 SHA-256: 05e2eeee49aa3a7239a9c546b37066e633b346d8ea2a45a7157ce9df67a252e8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying it as a redirector link to 'https://ttraff.ru/pify?keyword=php+submit+form+without+button'. Another heuristic indicates a PDF link farm, suggesting an attempt to distribute content or lure users. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.ru/pify?keyword=php+submit+form+without+button
    • http://files.dianamcintyre.com/uploads/1/3/2/8/132815123/39378450c08.pdf
    • http://files.pkidchickscollection.com/uploads/1/3/0/7/130740292/6587680.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/rifavusuwumez.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/pumibojeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/5176/8225/files/81592603906.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/cbse_maths_book_for_class_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/soduwuvaxisixewuzovivodiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/gujupazokomakexixadof.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/test_apgar_neonatal.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6822/files/lupepefuzolofugola.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/fazopozew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/19932973561.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7645/files/60328612784.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/34647763426.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_off00007290.bin
4cce008ae75979bbc49861b0c8848591c1940863f9e7e7cac9b0f431648024f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 5132 bytes
font_01_sfnt_off000083ec.bin
33d7c41906cfd3caf996c92a47505f336664832691353abf44d49e6f8b3fd959
pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC 10380 bytes