PDF malware analysis — malicious · 26bf26d8411c227b

MALICIOUS

PDF

43.0 KB Created: 2020-08-06 13:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3c851bc268c2ec744292969d92219453 SHA-1: 88df2d39c89e5ac0a90c82e80db6f77c972fb0ad SHA-256: 26bf26d8411c227b15864e19054e391d2389d78071438c7393dd6436cd1d291d

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=curso+aprendizajes+clave+preescolar+pdf`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including `https://cdn.shopify.com/s/files/1/0431/4588/7905/files/gitebazupemugij.pdf`. The document body, though partially corrupted, contains text related to 'Curso aprendizajes clave preescolar pdf' and the redirector URL, suggesting a lure to download a PDF. No scripts were extracted from this sample.

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=curso+aprendizajes+clave+preescolar+pdf
- http://files.hackmatacktrailracing.com/uploads/1/3/1/4/131483154/cf1ab.pdf
- http://tagumaj.beyondbeautydevon.com/uploads/1/3/1/3/131379362/nurivevirela_zadaxovabefi_musamarud_towunemu.pdf
- http://files.capillariesjournal.com/uploads/1/3/0/8/130813992/ce1ad6c.pdf
- http://letujeli.4rtomorrow.org/uploads/1/3/2/7/132741029/aaef1d1759fc.pdf
- https://cdn.shopify.com/s/files/1/0431/4588/7905/files/gitebazupemugij.pdf
- https://cdn.shopify.com/s/files/1/0437/1618/2166/files/76257444809.pdf
- https://cdn.shopify.com/s/files/1/0429/4672/3996/files/54690526014.pdf
- https://cdn.shopify.com/s/files/1/0437/8145/6023/files/animal_farm_book.pdf
- https://cdn.shopify.com/s/files/1/0432/6139/5102/files/64291652317.pdf
- https://cdn.shopify.com/s/files/1/0427/9851/4343/files/numirudewunaguko.pdf
- https://cdn.shopify.com/s/files/1/0429/6327/1833/files/74225619568.pdf
- https://cdn.shopify.com/s/files/1/0433/6890/6906/files/bowopijogos.pdf
- https://cdn.shopify.com/s/files/1/0436/1709/1744/files/regepovuwonixut.pdf
- https://cdn.shopify.com/s/files/1/0435/5942/0063/files/48875415258.pdf
- https://cdn.shopify.com/s/files/1/0431/3179/7668/files/37414996685.pdf
- https://cdn.shopify.com/s/files/1/0430/7573/1616/files/nuwaworugugebukufox.pdf
- https://cdn.shopify.com/s/files/1/0429/0058/6649/files/87103866147.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
`stream_004_off0000774e.bin` `ab813c682fc57a31ad17584568fcde417950039f5d8997d777280c60f0dbadc2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x774E	11816 bytes
`font_00_sfnt_off00006553.bin` `d147563091b11ad47bc8c28c386e626a7b53591254c9f0dde3299efa05e8f838`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6553	5240 bytes

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