PDF malware analysis — malicious · 239ddfae7b511ccb

MALICIOUS

PDF

48.3 KB Created: 2020-08-31 13:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ec3d05ec41a1e953a32516de53d2cf40 SHA-1: 1858244ee08d8893229d20681920fcc61f4ed010 SHA-256: 239ddfae7b511ccbc7fc103b4239a613bb18258f9b90428d03d4b61679a31956

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a critical heuristic for containing a malicious redirector link, specifically 'https://ttraff.cc/wix?keyword=ipcc+fifth+assessment+report%2528+ar5+gwp'. Additionally, it was identified as a PDF link farm containing numerous external links, with the primary one pointing to 'https://static.usrfiles.com/ugd/d775a9_a441ead586d54c49955e0cd87aee1816.pdf'. The ML classifier also strongly indicated maliciousness.

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=ipcc+fifth+assessment+report%2528+ar5+gwp
- https://static.usrfiles.com/ugd/d775a9_a441ead586d54c49955e0cd87aee1816.pdf
- https://static.usrfiles.com/ugd/b8c837_6e04b37cf8234c69b4a55d7882f1f717.pdf
- https://static.usrfiles.com/ugd/f46427_2b5885d2721e4d9c9867cc8bf88d51af.pdf
- https://static.usrfiles.com/ugd/b8c837_0dbe673e0fad465ca3f6a0cec99cd676.pdf
- https://static.usrfiles.com/ugd/b8c837_82385f9d59ed4428bca736db4adbc6de.pdf
- https://static.usrfiles.com/ugd/51c472_8f5ccf8d7a114c6daf6ce7f81af9f025.pdf
- https://static.usrfiles.com/ugd/b8c837_16e25ccc27be480499701f392cade4ff.pdf
- https://static.usrfiles.com/ugd/32777b_f066843df43948e4bfb8bd579a56b8f4.pdf
- https://static.usrfiles.com/ugd/b8c837_aa573429fb52486d9ceffad07794d9fb.pdf
- https://static.usrfiles.com/ugd/8b9728_7d1392ead6554aea88f3c78969c11d58.pdf
- https://static.usrfiles.com/ugd/253000_4f4306f405364ee289af4b40ed442051.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_off00007d6b.bin` `8bd5fe60f682d7b426155b1c87eaf07973cba99a9044caebe75c44fddf064981`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D6B	5628 bytes
`font_01_sfnt_off00009087.bin` `03f2d30bd26fea6d01974035d90bbfe084fdf4be6645080c8de2cb011547bdaf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9087	10424 bytes

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