Malicious PDF — malware analysis report

Static analysis result for SHA-256 614bd624b48ea66d…

MALICIOUS

PDF

72.0 KB Created: 2020-07-28 19:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a43ffde8d40251c2b4eb1fe5dee2b135 SHA-1: 9f5de89a74a6c6d587c1f47515d50f942b21b6f4 SHA-256: 614bd624b48ea66d55e02290f02e1a207ed58a101dcdbf42105c496e5adfe633
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDF files, indicating a link farm. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the document body's deceptive title and the presence of malicious redirector links strongly suggest a malicious intent.

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=abstract+example+for+technical+report
    • http://files.strategictalentadvisors.com/uploads/1/3/1/4/131437017/zapokusamidijafubeke.pdf
    • http://files.strongteams.net/uploads/1/3/0/7/130739444/2585744.pdf
    • http://files.stylebysmo.com/uploads/1/3/1/8/131872021/659f60a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/rixozetezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/76794839174.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/14539800426.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/tukisajuxoxufowodipoduj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/jokekelewefoparudutuxorim.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/vaxexemuputelokilebogege.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/41945192597.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/wenonopigeludulawasawuri.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/68540756211.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/rofupek.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_off0000db9c.bin
e4ab9567614cd33f838bff16bedb2dd052d54a18feb5f005b1ea874f6d8bce7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 5240 bytes
font_01_sfnt_off0000ed38.bin
e663fe0ceca2feb686bef8f9798f9259a1a179e51569f8468468f3d83a95db5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 11012 bytes