Malicious PDF — malware analysis report

Static analysis result for SHA-256 b017356212b7de48…

MALICIOUS

PDF

50.8 KB Created: 2020-08-29 23:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b486029050c052af15ce8d80f40762 SHA-1: 0879ab9b446f9b58a700dd9832dfc954b5c4e5f9 SHA-256: b017356212b7de48b37838142601e4be9e1d55e3f9ff5e6c728b1f1416600f5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword related to educational content. This suggests a phishing or social engineering attempt to direct users to malicious infrastructure. The PDF also functions as a link farm, pointing to numerous other PDFs, likely to obscure the malicious intent or for SEO manipulation. No scripts were extracted, limiting the analysis of direct payload delivery.

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/wix?keyword=rocket+math+multiplication+3rd+grade
    • https://static.usrfiles.com/ugd/0a593f_8a2229c8ac2e4e189972de926ff0312c.pdf
    • https://static.usrfiles.com/ugd/9b5f63_9d50cf8ce9a04dec9b38de6460285f7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9dd1f4941204249bc8796e2d77bc6a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6b09d0ef47d445bb7a58f12c76a5975.pdf
    • https://cdn.shopify.com/s/files/1/0460/7190/6468/files/sumelozujobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/71592169883.pdf
    • https://cdn.shopify.com/s/files/1/0440/1001/2837/files/7135918973.pdf
    • https://cdn.shopify.com/s/files/1/0433/9944/6693/files/20827261757.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4651/files/prove_linear_transformations_is_injective.pdf
    • https://static.usrfiles.com/ugd/b8c837_98354f1194a24134a6492c032af1aa61.pdf
    • https://static.usrfiles.com/ugd/cf14a4_9369f8e4a739440481caec7c23388e7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d78f471f79da4167b0a7e9953e87252a.pdf
    • https://static.usrfiles.com/ugd/3b7182_10e4de352284439f96a1f9cc354c9bb9.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b07.bin
d96b9f865f7e3300148a8315c33bc12071bcdfde47b921aa7ce0ebdb82a83042
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B07 5428 bytes
font_01_sfnt_off00008d4d.bin
bb1afe7d1fa10ce1ef4a1cef4d2efce2e416b65ac607c497ae31bb1493950b59
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4D 10120 bytes
font_02_sfnt_off0000afe7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE7 4324 bytes