Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b75a72078278859…

MALICIOUS

PDF

32.0 KB Created: 2020-08-04 08:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfda164c304e2abbb4cb5ff1c0893c7d SHA-1: 5af276b7bb8369426a9d7252c5a3c59237b36e11 SHA-256: 7b75a72078278859b8f5440633538d69a2a3c5d9df17248109ceb34147ecac18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The primary malicious URL identified is ttraff.com, which is used to redirect users to other potentially harmful sites. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to distribute or link to malicious content.

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=alter+ego+plus+c1+pdf
    • http://tetevat.haultymyt.com/uploads/1/3/1/0/131069860/vuvoxozubakimedonag.pdf
    • http://files.ben-noble.com/uploads/1/3/1/3/131378776/suxutirob.pdf
    • http://files.lmceducationalpartners.com/uploads/1/3/1/4/131482916/vaduweras_rovedituxeb_lirij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/taromap.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/31449071147.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/nojiza.pdf
    • https://cdn.shopify.com/s/files/1/0440/0952/1317/files/11687825438.pdf
    • https://cdn.shopify.com/s/files/1/0439/2439/0056/files/jiruxakujenegupozurifel.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/71558357502.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/41606216877.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/76752722972.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/60538998211.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/rolubavugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/granulocytes_vs_agranulocytes.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_off000042b5.bin
502ea5ba6a48d887ae8bffe74b83db58a0e6702819e9857c7d2331aca16e576e
pdf-font-stream PDF embedded font (sfnt) at offset 0x42B5 5152 bytes
font_01_sfnt_off00005460.bin
0db0dc16cc76d80ef505a6906842709522cf65b2eb8aa404f971a68ad1ef5b13
pdf-font-stream PDF embedded font (sfnt) at offset 0x5460 9116 bytes