PDF malware analysis — malicious · 3867654a962499fe

MALICIOUS

PDF

41.5 KB Created: 2020-08-28 21:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fb20fd6c562755d72e42d363f9092d76 SHA-1: 43abbf27fcd781ada6aff38387939e8aafbfb6b5 SHA-256: 3867654a962499fe81f99bde8d0587ea3335ab6aab3ffa2e9e1b7fdfb15e143c

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with the primary heuristic identifying a malicious redirector URL. The document body, though heavily obfuscated, also contains this malicious URL. The presence of a link farm and a malicious redirector suggests an attempt to lure users to a compromised or malicious site, likely for phishing or malware distribution.

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=las+grandes+divisiones+de+la+histori
- https://cdn.shopify.com/s/files/1/0432/7594/4091/files/liwevonedug.pdf
- https://cdn.shopify.com/s/files/1/0433/8260/3927/files/mp3_converter_unblocked.pdf
- https://cdn.shopify.com/s/files/1/0433/3957/9546/files/giluxaxukarufona.pdf
- https://cdn.shopify.com/s/files/1/0435/2750/4024/files/back_to_school_activities_for_kindergarten.pdf
- https://static.usrfiles.com/ugd/b8c837_374079b2775b4614b91333ce9e794495.pdf
- https://static.usrfiles.com/ugd/b8c837_d1b07e5cc80f421399e748d3e082ab2a.pdf
- https://static.usrfiles.com/ugd/b8c837_70ecd7a810a944bd9e73a6ad259d29e1.pdf
- https://static.usrfiles.com/ugd/b8c837_586882f55bae49f7be74bbd8bae9132f.pdf
- https://static.usrfiles.com/ugd/b8c837_5e117074dfaf411d888b606c2b7bed3b.pdf
- https://static.usrfiles.com/ugd/b8c837_fe0b654dd6f3450fa4922c0acb5911b7.pdf
- https://static.usrfiles.com/ugd/b8c837_68d2c8855b2a4a2b8bc2f4f02c9fc655.pdf
- https://static.usrfiles.com/ugd/b8c837_53a242ddfb664530a6fc47c840efeb9d.pdf
- https://static.usrfiles.com/ugd/b8c837_892d3fbbb69d41a09f1340ce68271130.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_off000062f0.bin` `030f1aa09d5e5a9ae33a6e53f60e62a0bd5f4cf60f737bd6fcda966f12f09189`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62F0	5088 bytes
`font_01_sfnt_off0000743d.bin` `e1b676acdedf80687a42272df3a3e18615e450e15a63661799965e707d39c94b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x743D	10848 bytes

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