Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b92bab4cd648911…

MALICIOUS

PDF

45.3 KB Created: 2020-09-02 23:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2364d7ee08db62672309743710e3216b SHA-1: 1f4e3eac9344bb08761ab840469c506c6743a1bb SHA-256: 7b92bab4cd648911686862d9654e8d9541c6d015807a3df72414500f37efa169
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to a flight report and URLs, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links further supports the malicious intent of redirecting users.

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.link/wix?keyword=china+airlines+flight+611+ntsb+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9602/9864/files/10140220381.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2791/files/jijototodimerew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/1808507677.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/55416293807.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/curriculum_vitae_francese.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/45006060777.pdf
    • https://cdn.shopify.com/s/files/1/0431/2462/1473/files/valaniwofefologabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/51648596994.pdf
    • https://cdn.shopify.com/s/files/1/0440/1761/4998/files/filmywap_2017_malayalam_movies.pdf
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/51126167112.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/39498067893.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1388fc8b3d64c2992cb931b9f52fd4a.pdf
    • https://static.usrfiles.com/ugd/078c79_f32a65308d2e4a9d8c1c41bc58482f64.pdf
    • https://static.usrfiles.com/ugd/83e24f_d0525998213340f38cedd73b0da384db.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_off000073c7.bin
e64494e256de530cf5ed8d423c12a0f6e61984113fb65db903a2d3de941eb1c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 5416 bytes
font_01_sfnt_off00008628.bin
4734b1517e73ae1f3ad45a819b0fb5ca17e3c685bc083f5caf04aabdb3511b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 10016 bytes