PDF malware analysis — malicious · 5233562de2489344

MALICIOUS

PDF

38.0 KB Created: 2020-08-12 05:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a75c7135f92366361501a6ff74ff61e1 SHA-1: bb57043e69e136afb57344032b3c8a61f439a42d SHA-256: 5233562de24893440ff51dba6d082a6c19eec4652f095e581ab402b2c8c04426

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one prominent URL leading to a known malicious redirector. The document body, though partially corrupted, contains text suggesting it is a lure for 'Avancemos 4 cuaderno answers pdf'. The primary malicious URL is ttraff.ru, which is flagged as a malicious redirector. The file is likely a downloader or phishing lure designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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.ru/pify?keyword=avancemos+4+cuaderno+answers+pdf
- http://files.andrew-brewer.com/uploads/1/3/1/4/131454116/495185.pdf
- http://kepobo.appleafterschool.com/uploads/1/3/0/7/130738799/22c3e.pdf
- http://files.shopthebluehydrangea.com/uploads/1/3/0/8/130874295/sivevopopeza.pdf
- http://files.csunifc.com/uploads/1/3/0/7/130775393/1213447.pdf
- https://cdn.shopify.com/s/files/1/0432/8924/7894/files/abba_mamma_mia_sheet_music.pdf
- https://cdn.shopify.com/s/files/1/0431/2717/7365/files/hernia_de_hiato_tratamento.pdf
- https://cdn.shopify.com/s/files/1/0437/4868/8033/files/28996236915.pdf
- https://cdn.shopify.com/s/files/1/0428/8544/7833/files/fuzamufux.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sekokejeninidifowabofu.pdf
- https://cdn.shopify.com/s/files/1/0430/0596/8537/files/troy_bilt_675_series.pdf
- https://cdn.shopify.com/s/files/1/0433/4305/2953/files/94734612710.pdf
- https://cdn.shopify.com/s/files/1/0437/7162/5621/files/ups_scs_air_waybill.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
- https://cdn.shopify.com/s/files/1/0431/5217/9364/files/zadimesonenovigujiti.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.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_off000048ce.bin` `3fb71e2348f1649e000f31a7db87054f419867d40d681e21a9bb4b3f99b13f99`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48CE	5252 bytes
`font_01_sfnt_off00005a94.bin` `6ac06c0893d3387635f123d0d227f73c8b2deed14a006a9a6923be532f62b92a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A94	10024 bytes
`font_02_sfnt_off00007cd8.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CD8	4324 bytes

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