PDF malware analysis — malicious · 19dbab535b4e1171

MALICIOUS

PDF

43.2 KB Created: 2020-07-27 17:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6ba44c5603d158442d56333bc1f9101e SHA-1: 4f97cf1053521ce1a45a345788e1673c346df912 SHA-256: 19dbab535b4e11712393ed3ac0fd3557c96b7a95be75e2b5d0414f52de07a4d8

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple heuristics indicating malicious intent, specifically linking to a known malicious redirector and acting as a link farm. The document body, though heavily obfuscated, suggests a lure related to an 'admission form'. The primary IOC is the redirector URL, which is likely the entry point to a malicious workflow.

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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=aiou+admission+form+2019+ba+continuing+student
- http://files.assemblyofgeeks.com/uploads/1/3/1/6/131636651/6241108.pdf
- http://files.olssyouth.org/uploads/1/3/1/3/131384635/linisenetajeme.pdf
- http://files.thequakermag.com/uploads/1/3/1/6/131606186/1527062.pdf
- https://cdn.shopify.com/s/files/1/0430/7812/3680/files/43704356281.pdf
- https://cdn.shopify.com/s/files/1/0434/6295/1074/files/28788728346.pdf
- https://cdn.shopify.com/s/files/1/0432/3685/1874/files/vezofubujuxo.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
- https://cdn.shopify.com/s/files/1/0438/5023/6064/files/maborobomaferuzi.pdf
- https://cdn.shopify.com/s/files/1/0429/4384/0412/files/58179249088.pdf
- https://cdn.shopify.com/s/files/1/0435/8940/2779/files/60741829547.pdf
- https://cdn.shopify.com/s/files/1/0436/2820/0096/files/tukonoxaxivupemulako.pdf
- https://cdn.shopify.com/s/files/1/0428/8220/3801/files/8146465792.pdf
- https://cdn.shopify.com/s/files/1/0437/8660/0609/files/86285165076.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wimuwukewamofese.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suton.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/1/0438/5023/6064/files/maborobomafe

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006940.bin` `b0b2b0b260093e6bfb50332b7337068ed282c32536bccffdc4040b53bb062cea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6940	5804 bytes
`font_01_sfnt_off00007cda.bin` `482b91590947cdd4c5a3d1f40e8f9dc3bc6e4844714f91d9c5d238e8fe39d767`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CDA	10168 bytes

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