PDF malware analysis — malicious · 24ec8934bfeceaa2

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 09:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cd302ab11d04c93224b402684e88449d SHA-1: 8fe955f9778c7da9fe144873c05b9adbbadf12b5 SHA-256: 24ec8934bfeceaa24080d9a9057340d97b9b8a2841e4322c99919c0bc321ea9d

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded links suggest a lure to download an APK, likely leading to malware. The presence of a large number of external PDF links further supports the classification as a link farm, designed to obscure the ultimate malicious destination.

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=cleo+gold+apk+no+root+download
- https://static.usrfiles.com/ugd/b8c837_14528a42e0e348f6a6ba60112970bfb4.pdf
- https://static.usrfiles.com/ugd/cec570_259953b2386d4df1a4dcfce70af1e450.pdf
- https://static.usrfiles.com/ugd/516793_42d23d7b0d0840ec98d7ac10a468036c.pdf
- https://static.usrfiles.com/ugd/b8c837_31301d09ce16491a85013ce73f17303e.pdf
- https://static.usrfiles.com/ugd/b8c837_7e21ccbca95d4bb39aa29dc03c6e41eb.pdf
- https://static.usrfiles.com/ugd/912de2_330432447a4146d8bf13ca1ce5ace0f1.pdf
- https://static.usrfiles.com/ugd/4b874d_9f876c0384104e96a05bb870f611f0e9.pdf
- https://cdn.shopify.com/s/files/1/0433/8361/9736/files/47431486002.pdf
- https://cdn.shopify.com/s/files/1/0433/4583/8232/files/14087769342.pdf
- https://static.usrfiles.com/ugd/33c377_efadd7b427404dff82c0f96317e7a024.pdf
- https://static.usrfiles.com/ugd/912de2_8495b1002846430f99ea5409cf7fe933.pdf
- https://static.usrfiles.com/ugd/b65acf_0404ff8e2d1842e892a30a60e81d6889.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_off00006768.bin` `4ffe2f39016e8811a514847b9905ac0b80f9149cb81c266b7810e253db8df418`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6768	5008 bytes
`font_01_sfnt_off00007896.bin` `735878ea70bed380ae4ccd9ed0300c05231d37a56426d19974f6212c0acbc358`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7896	10360 bytes

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