Malicious PDF — malware analysis report

Static analysis result for SHA-256 714008a95908729a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 11:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f563fde283544487046daa326519917 SHA-1: 467dfa906baf8009b32ec73836cc0b7bde05b8e2 SHA-256: 714008a95908729a8b6e8d28bffe36e1402377d59f4a99fa4bfb264e8e4c893a
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.com/pify?keyword=attendance+record+sheet+pdf`. The document body, though heavily obfuscated, contains embedded URLs suggesting a lure to download further content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a content-farming or redirection scheme.

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=attendance+record+sheet+pdf
    • http://files.quaintrellemag.com/uploads/1/3/1/4/131483201/8288320.pdf
    • http://files.taylormadebling.com/uploads/1/3/0/7/130739069/270d2.pdf
    • http://files.sapphiremj.com/uploads/1/3/0/7/130776413/8835389.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/xikupuvokidakolaniwapuba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/jimuxugosavitofewa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1862/3896/files/17544327794.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/51468598251.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/rupuxuwubanigefajej.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/indiana_bmv_police_inspection_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/sojal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7017/files/dibemonu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/52293881980.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/fitudavekuxutalaxave.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_off00006674.bin
4d42073ce1e312762438be4c755d16fc236353e4cdbc39b0c47ef20fc7f68839
pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 5200 bytes
font_01_sfnt_off00007820.bin
2e1220eec66b9344b35a162f8534623e8517787b492432bf16eb767f1af24a11
pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 9972 bytes