PDF malware analysis — malicious · 391e0adf2a9c2c2c

MALICIOUS

PDF

39.2 KB Created: 2020-08-29 11:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3314319b6428f7c5d6502bde81f82b8c SHA-1: 005337222dbe38987d0d3e6d5188f371b3e1eb13 SHA-256: 391e0adf2a9c2c2ce71af765fecc504869279c9a20255f01734b2f9a97aa4e2b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.cc'. This redirector is likely used to obscure the final destination, which could be a phishing page or a malware download site. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is part of a malicious distribution campaign.

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.cc/wix?keyword=springer+paper+template+overleaf
- https://static.usrfiles.com/ugd/b8c837_16f9b168beec40f4aba744411290e806.pdf
- https://static.usrfiles.com/ugd/b8c837_e025d2f578b448c692e7da89d6058c43.pdf
- https://static.usrfiles.com/ugd/b8c837_efc6fe953ec6424396a962789aae88c5.pdf
- https://static.usrfiles.com/ugd/b8c837_3b8472b5931f4c70b0af256d32544c98.pdf
- https://static.usrfiles.com/ugd/b8c837_fbad77c40c464302a7f3396c96280163.pdf
- https://static.usrfiles.com/ugd/b8c837_baa277f25a374441b94f96ba31ad475b.pdf
- https://static.usrfiles.com/ugd/b8c837_7339051676e34dbe9b5a7647ef9d821e.pdf
- https://static.usrfiles.com/ugd/b8c837_b61eece07ac84e12a16fc3fc155c8555.pdf
- https://static.usrfiles.com/ugd/b8c837_4f39526450b84a16907df117671e9271.pdf
- https://static.usrfiles.com/ugd/b8c837_1f92a996abf14a9599ad34c08083dd27.pdf
- https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.pdf
- https://cdn.shopify.com/s/files/1/0437/6949/5710/files/jagadasigobitolewa.pdf
- https://cdn.shopify.com/s/files/1/0433/4016/9384/files/vevulokakepe.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005b85.bin` `8d80c7d40c760d1769d718e909116ad8e9d383977469cfd9fc8d527626476153`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B85	5208 bytes
`font_01_sfnt_off00006d31.bin` `abffe4492eefd3941e204a258767c6cf7b3be2b69a8e97c4bd5fa936726f6ce4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D31	10388 bytes

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