Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abb434d255cffd9…

MALICIOUS

PDF

37.7 KB Created: 2020-08-25 01:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7924a93290f6e586a3d67644288454f SHA-1: 6dab0118cfa725aca00ce57d26680541fa816bcc SHA-256: 6abb434d255cffd9d2a67f58dd83f29987ef26252dee933ac09ac98b9eda2f9f
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=cinderella+and+four+knights+all+songs', is flagged as a malicious redirector. The document body also contains this URL and other links, suggesting a lure to external content. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, further supporting a malicious intent to redirect users to potentially harmful sites.

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=cinderella+and+four+knights+all+songs
    • http://voxinuj.barbararussellcatering.ie/uploads/1/3/2/6/132680974/pozivironumegikavo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/59359137084.pdf
    • https://cdn.shopify.com/s/files/1/0432/8334/9657/files/68288711500.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/10576809526.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7031/files/41707536095.pdf
    • https://cdn.shopify.com/s/files/1/0433/5062/2358/files/convert_cdr_file_to_jpg_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/patricia_benner_theory.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/adding_polynomials_linked_list_java.pdf
    • https://cdn.shopify.com/s/files/1/0458/1510/3654/files/leperafavilidewojazeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/tuginizuvowi.pdf
    • https://cdn.shopify.com/s/files/1/0465/1584/7326/files/lufub.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/nizokumodir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.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_off000049f2.bin
e6aaca4ae3d57150dcfd8ca4493cd02bc2320b0954ea26027eca3fd3768c4665
pdf-font-stream PDF embedded font (sfnt) at offset 0x49F2 5140 bytes
font_01_sfnt_off00005b65.bin
afd48fcd3503acdd7010766274e01b418174adaa330afd8fcd8bc9cae9257369
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B65 14908 bytes