PDF malware analysis — malicious · 60a5f2d661a2aa78

MALICIOUS

PDF

55.1 KB Created: 2020-09-02 01:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 988be1c1c5d73cb6dfb36391e6a76155 SHA-1: c5811c882320bd921719c160c64ac6cf0abc3394 SHA-256: 60a5f2d661a2aa78c3095e54cb8b3bb455ee4bbc62ff2ca39efaa45b90ec3d98

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged as malicious due to embedded links pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=condor+user+guide. While no scripts were extracted, the presence of malicious links suggests an attempt to lure the user to a harmful site, consistent with spearphishing tactics.

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.ru/wix?keyword=condor+user+guide
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b98abb_197662545e4341fa8ffcb5fca5360d99.pdf
- https://static.usrfiles.com/ugd/a4d998_1a7fd24e488f4e87988ab2cc01bcd541.pdf
- https://static.usrfiles.com/ugd/b8c837_c24447d30b8c47828084a64ed750a70b.pdf
- https://static.usrfiles.com/ugd/027f51_cd370e7a0ba54b4c8b000995651c0cbe.pdf
- https://static.usrfiles.com/ugd/b8c837_f241eb9db7644141ace89f25ad2568df.pdf
- https://cdn.shopify.com/s/files/1/0440/1725/4565/files/the_united_states_constitution_and_amendments.pdf
- https://cdn.shopify.com/s/files/1/0433/6877/5841/files/1869169312.pdf
- https://cdn.shopify.com/s/files/1/0447/0331/8170/files/tutu_app_ios_link.pdf
- https://cdn.shopify.com/s/files/1/0436/1791/0946/files/1953_ford_jubilee.pdf
- https://cdn.shopify.com/s/files/1/0430/0197/0837/files/57410734076.pdf
- https://cdn.shopify.com/s/files/1/0433/9807/0435/files/books_for_ssc_stenographer_exam.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00009124.bin` `81aa01e754b0f24497d461e53ca4ed3b672c2313c59c00c9f3b8612cfcb53d2c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9124	4656 bytes
`font_01_sfnt_off0000a104.bin` `17e402a2747e5aff7a8314d29aa2abd7e7e22f1576a6e911f64c7741c15bbb51`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA104	14888 bytes

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