PDF malware analysis — malicious · 46ce4233456d1e20

MALICIOUS

PDF

46.6 KB Created: 2020-07-25 03:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 559b1718c7c495bd311378f3e16197c4 SHA-1: 3ecfed85decb939828830cfa35e4b7f3d8b87c11 SHA-256: 46ce4233456d1e205eb48337032f48110f5dbdea6f6efa5af77671e3f485a2a4

120 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to a known malicious redirector. Another critical heuristic, PDF_SEO_LINK_FARM, highlights the presence of a link farm. The document body, though heavily obfuscated, contains text related to academic materials, suggesting a lure to disguise the malicious links. The primary malicious IOC is the redirector URL, which likely leads to further malicious activity.

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=excursions+in+modern+mathematics+seventh+edition+answers
- http://files.valleyhuntervizslas.com/uploads/1/3/0/9/130969695/mezuget.pdf
- http://files.dharmayogawheel.com/uploads/1/3/0/7/130775197/pekalebosov-doburutuwidunoj.pdf
- http://files.valerieconnor.com/uploads/1/3/1/4/131437285/1983251.pdf
- http://files.southactorsguide.com/uploads/1/3/1/0/131070379/xerowoko.pdf
- https://cdn.shopify.com/s/files/1/0433/7614/8638/files/pasarom.pdf
- https://cdn.shopify.com/s/files/1/0432/0421/4942/files/45083310128.pdf
- https://cdn.shopify.com/s/files/1/0440/9622/5432/files/98654333367.pdf
- https://cdn.shopify.com/s/files/1/0430/3575/4650/files/47760386635.pdf
- https://cdn.shopify.com/s/files/1/0433/7028/3173/files/tejumotilutodux.pdf
- https://cdn.shopify.com/s/files/1/0435/2756/9576/files/mefafidemumawaki.pdf
- https://cdn.shopify.com/s/files/1/0431/4939/4071/files/botemisotanowum.pdf
- https://cdn.shopify.com/s/files/1/0432/1142/3902/files/20115702496.pdf
- https://cdn.shopify.com/s/files/1/0433/5363/7018/files/41946582767.pdf
- https://cdn.shopify.com/s/files/1/0434/8359/4909/files/wuvabuja.pdf
- https://cdn.shopify.com/s/files/1/0434/4525/6352/files/kadakif.pdf
- https://cdn.shopify.com/s/files/1/0435/5850/2563/files/xixowupagixiraremeb.pdf
- https://cdn.shopify.com/s/files/1/0432/3105/1943/files/tulitudosazenuxiwazok.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/
- https://cdn.shopify.com/s/files/1/0430/3575/4650/files/477603

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007637.bin` `f7e0c6647778d3469bf5dce4bce62d95d8b3bc3a743bf7329ed4d419327ee73b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7637	5204 bytes
`font_01_sfnt_off000087c5.bin` `fbfba7933b1fa0bcfd628b0b700dad49268edc1ab26d70d5416b9c6e8975a29f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87C5	10908 bytes

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