PDF malware analysis — malicious · 84d469a8226573e9

MALICIOUS

PDF

42.0 KB Created: 2020-09-02 13:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 33bb865d202d39aa6c3a3b098647e2c3 SHA-1: 5a38b2b316362313fcdf6a34bd298f6b9991a850 SHA-256: 84d469a8226573e96bdacd5a2bb328640fb64d63c75de74195fba8070bb8b1a7

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, forming a link farm designed to direct users to malicious infrastructure. The primary malicious URL identified is https://ttraff.link/wix?keyword=pct+applicant%2527+s+guide+national+phase+singapore, which is flagged as a malicious redirector. The document's content and structure suggest a social engineering attempt to lure victims through deceptive links.

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=pct+applicant%2527+s+guide+national+phase+singapore
- https://static.usrfiles.com/ugd/1479de_2112ace6baa54bfa8c6afcd628d255a6.pdf
- https://static.usrfiles.com/ugd/ae15ca_d8509704c3904926bb344c8009c90a53.pdf
- https://static.usrfiles.com/ugd/6240f8_41c9313731fc4d6b961c2f28f8172c4f.pdf
- https://static.usrfiles.com/ugd/ade4e6_a1d3eeb8e57f4cc8b1f1309b71667210.pdf
- https://static.usrfiles.com/ugd/b8c837_20d82a16a88e4f5791e57b7def2b1a52.pdf
- https://static.usrfiles.com/ugd/b13fd1_35a13497e35e4a6da4c82ccd8a601150.pdf
- https://static.usrfiles.com/ugd/b8c837_2b933f5f6e99408eb214fd4efcbba7dc.pdf
- https://static.usrfiles.com/ugd/c1615c_9d88a18f56a34179a2c6a10abca0d9d7.pdf
- https://static.usrfiles.com/ugd/0f5b72_094b888f42834e60a2b7b474929eff36.pdf
- https://cdn.shopify.com/s/files/1/0441/3331/8808/files/chamberlain_garage_door_opener_manual_model_953estd.pdf
- https://cdn.shopify.com/s/files/1/0430/6694/9786/files/2045903751.pdf
- https://cdn.shopify.com/s/files/1/0432/6473/7448/files/negogus.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_off0000667d.bin` `9b0949074b2cade711511d644185d26de449d7c52a8741aeda961530934ded7e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x667D	5372 bytes
`font_01_sfnt_off000078bc.bin` `ccfe6e61dbdcece5690be3bad163df26c7792e3d519bae703892b221e4182488`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x78BC	10180 bytes

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