Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fbd7f77a20ef90…

MALICIOUS

PDF

36.2 KB Created: 2020-08-17 16:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3cfc0e056104b8892d27eb78eca1003 SHA-1: 758c9523ed8f88549562534035b9771a3fc0a4d4 SHA-256: 70fbd7f77a20ef9022f2eb077becc82fbda3fef4d3d05602c6629151871f40df
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, likely as part of a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=cinema+4d+r16+trial'. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting the primary goal is to drive traffic to malicious sites under the guise of providing software downloads.

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=cinema+4d+r16+trial
    • http://files.womencliniccentre.com/uploads/1/3/0/7/130739204/bibebekomizojajap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8605/2504/files/6792376952.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/the_cultural_landscape_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/63647528782.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/nelevav.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/topological_sort_java.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/53342998502.pdf
    • https://cdn.shopify.com/s/files/1/0437/9770/8957/files/drake_and_josh_seasons.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/alif_lam_mim_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/ganuzamitelumabuwalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/31853191965.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/nirum.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_off00004e13.bin
30687519f935d826f8be8312fbe0d98148f4a5ae10a5f2012dd273cf71bea77d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E13 4992 bytes
font_01_sfnt_off00005ef3.bin
3f5663817fa0ca2eb18aa048709bd17a9749c82c29efdbdf83a1ace85d69b5c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 11172 bytes