PDF malware analysis — malicious · ec7bee8e1ee6751e

MALICIOUS

PDF

43.0 KB Created: 2020-09-05 09:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1d966da145153d0306a019ee6470fdfa SHA-1: 4eefdaf143f12ece012e4cb88e1ff1d6825cd63c SHA-256: ec7bee8e1ee6751e21246f297ec097c1c995f9958252d4daa27fcd190c95e33d

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.me, disguised as a digital photo frame manual. This URL is likely intended to lead the user to a phishing or malware distribution site. The PDF also contains a large number of external links, many pointing to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier 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.me/wix?keyword=aluratek+8+digital+photo+frame+manual
- https://static.usrfiles.com/ugd/de3d83_91963737180148a6888a8c5e09093d6d.pdf
- https://static.usrfiles.com/ugd/39d081_2e231312cc384631acc4ed0c1215d77a.pdf
- https://static.usrfiles.com/ugd/576447_458063ddbe724105b1ef32cf9f346c80.pdf
- https://static.usrfiles.com/ugd/6116da_9bd22efbd8584f4d90721a90a7c57676.pdf
- https://static.usrfiles.com/ugd/74e905_219cabac774c4c4e8e410c263f917546.pdf
- https://static.usrfiles.com/ugd/1be480_dfbc05a37cbb41578eb55a5c4f243e91.pdf
- https://cdn.shopify.com/s/files/1/0431/7360/9636/files/batho_bana_video.pdf
- https://cdn.shopify.com/s/files/1/0431/0273/2448/files/kenupiwegawebamuwirela.pdf
- https://cdn.shopify.com/s/files/1/0432/0998/2107/files/xajikupuzikojevokokik.pdf
- https://cdn.shopify.com/s/files/1/0439/1872/1192/files/prenup_agreement_template_australia.pdf
- https://cdn.shopify.com/s/files/1/0432/0378/8964/files/ms_excel_lookup_function.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_off000067be.bin` `926b46d259eeabd57446cf9d525557e5055dac563e94b4c1fb52d569ad718d1d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67BE	5524 bytes
`font_01_sfnt_off00007a62.bin` `f4d2d98aec6e52e4c6e2b2b1e340b30a4f8acaf5b0681b16891efde9275c21a9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A62	10436 bytes

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