Malicious PDF — malware analysis report

Static analysis result for SHA-256 690fa7cb3062fc89…

MALICIOUS

PDF

43.3 KB Created: 2020-08-19 02:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea4ae5b9de1c4f3ddd65c0b165de68c SHA-1: 6c255f5b8fdf8928eed0bfe561d02226812abe6b SHA-256: 690fa7cb3062fc8928e863b9c7224362b1c664aa6617d9cbacc9b741408bb8f7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, contains text related to 'environmental management system template' and includes the primary malicious URL. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of links to known malicious infrastructure.

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=environmental+management+system+template+small+business
    • http://sejejeni.tokyomath.com/uploads/1/3/2/8/132814664/ziduwalin.pdf
    • http://nijase.buzzsalonnorthfield.com/uploads/1/3/1/1/131164250/b77520f.pdf
    • http://files.segamatbikers.com/uploads/1/3/0/8/130874347/5612856.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/88374968412.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/49682012160.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/83830957758.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/42154009911.pdf
    • https://cdn.shopify.com/s/files/1/0438/9755/3064/files/fogaludubuxewufiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9679/9384/files/97220234329.pdf
    • https://cdn.shopify.com/s/files/1/0435/2684/8661/files/30890273042.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/cub_cadet_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/medios_audiovisuales_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/80182324038.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_off00006ab2.bin
be0ebfa022259c85681424140d000cc53866faf19d1443f0191b852dc5ac3feb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB2 5400 bytes
font_01_sfnt_off00007cfa.bin
6ff73b87f1d511510070d62d27db628096efa779da8ca23f15fb6a6e4744d49a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFA 10252 bytes