Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dc3a889e7c419c…

MALICIOUS

PDF

35.9 KB Created: 2020-08-19 12:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2941fffa4fe31109515673d3d970a7a4 SHA-1: 663b92089df22dfb45c1e588cb21e6f7e76bcbab SHA-256: 62dc3a889e7c419caca959d11c63bb0718cfd02e68af2cd7accbb25018625701
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 'https://ttraff.ru/pify?keyword=ahimi+as+deka+mage+dj+song'. This indicates a malicious intent to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the PDF structure suggest a phishing or malware distribution attempt.

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=ahimi+as+deka+mage+dj+song
    • http://files.willyssolekitchen.com/uploads/1/3/2/6/132682655/1505427.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/20449730266.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/collingwood_college_camberley_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/4956/6886/files/befunoliketobiboviwadixef.pdf
    • https://cdn.shopify.com/s/files/1/0440/6408/0024/files/alesis_3630_compressor_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/91194287475.pdf
    • https://cdn.shopify.com/s/files/1/0447/6777/2821/files/96606400445.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/wujona.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/16412557910.pdf
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/gate_syllabus_instrumentation_engineering.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_off000041ee.bin
3acd78fa9ebe3f9656301bb5c9c3d1f4ab86a77fbddd41f2c9ced17b50eac829
pdf-font-stream PDF embedded font (sfnt) at offset 0x41EE 4948 bytes
font_01_sfnt_off00005291.bin
62bdb51679282060087216f29e552e8d81877f7172022bda3b66b55ed111e578
pdf-font-stream PDF embedded font (sfnt) at offset 0x5291 10188 bytes
font_02_sfnt_off00007529.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 4324 bytes