Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d1df5cb8677833…

MALICIOUS

PDF

44.5 KB Created: 2020-08-03 07:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9214747618da1ae834c99ced6b23018 SHA-1: b69db181357158d191b55213ce4b0cf22781f35a SHA-256: 14d1df5cb867783385b3f4da1bd0e39ac8a9007394cc4123ba55cd681fbc2051
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious objective. The ML classifier strongly indicated maliciousness, supporting the presence of malicious content within the PDF.

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=huffman+tree+java
    • http://files.empowerappleton.com/uploads/1/3/0/7/130775675/najigudav.pdf
    • http://files.raleighwellnesscenter.com/uploads/1/3/1/4/131409305/sujare_fapikowu_juwumoned_vukezefek.pdf
    • http://files.spelledlikethehockeyplayer.com/uploads/1/3/1/0/131069832/vujekukupapiwaduja.pdf
    • http://files.aaronjarden.com/uploads/1/3/1/0/131070051/pafeduxaxiked.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/36137354912.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/70462940316.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/lutusenidemubukob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/jonbenet_ramsey_autopsy.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/detug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/fojuvalotafux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/sebagovafufekugun.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4018/files/31745023445.pdf
    • https://cdn.shopify.com/s/files/1/0434/6062/4537/files/mevugawetotuxorofep.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/lovunif.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_off000065f9.bin
fc0f8e30bc7eb93c07833dbb9204c5e6e9ca72f5b5e19d54c4a9fa0dc09dbc41
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 4800 bytes
font_01_sfnt_off0000763a.bin
9fbc85768c1074e6bd94f99d375751f5bc4a042c0e56bb2894d9ff664d907708
pdf-font-stream PDF embedded font (sfnt) at offset 0x763A 14596 bytes