PDF malware analysis — malicious · d30a95b43fb72ca8

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 08:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e0e1a9913907c62bd6ac113fc35c251b SHA-1: de66426335c0863a73d285a7321d7cd09f14fd2d SHA-256: d30a95b43fb72ca8e990ead81a158ca7d91e02d7064d63999d24e0741b2491d2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a 'condensation polymerisation worksheet'. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to host further malicious content or phishing pages.

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.me/wix?keyword=condensation+polymerisation+worksheet
- https://static.usrfiles.com/ugd/b8c837_9acc212e5ff740a98d511d212432a204.pdf
- https://static.usrfiles.com/ugd/b8c837_472b0cba763d46308803ba4754990508.pdf
- https://static.usrfiles.com/ugd/b8c837_7b12ea54676b4fd69226921cd694a7aa.pdf
- https://static.usrfiles.com/ugd/b8c837_13dd1ac9877a4aa59591c1f66ce211d2.pdf
- https://static.usrfiles.com/ugd/b8c837_1afed4af97774fb89ac2cd30adfd8427.pdf
- https://cdn.shopify.com/s/files/1/0431/8606/1463/files/48326136254.pdf
- https://cdn.shopify.com/s/files/1/0428/2925/0719/files/fenilepemulo.pdf
- https://static.usrfiles.com/ugd/b8c837_25f14091bed6462d88a10a8ec97254aa.pdf
- https://static.usrfiles.com/ugd/b8c837_c71cc29711f14ec4a8c7d5365db5f530.pdf
- https://static.usrfiles.com/ugd/b8c837_4e9739adb50e479a87f65fc5b70b1637.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005676.bin` `985785688acff87ecc7d843643ffc98d2d86fff3576699d1a7af17d8ab145a9b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5676	5268 bytes
`font_01_sfnt_off00006848.bin` `0ceece545a213fedf1c3ecca8bd28feb6fa9ae19090637425d2c28b506b1adbd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6848	9884 bytes
`font_02_sfnt_off000089d2.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89D2	4324 bytes

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