PDF malware analysis — malicious · d9634b71dc0ce38b

MALICIOUS

PDF

44.1 KB Created: 2020-07-31 01:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4a0925d3e3e788420d97ab75a86cf23d SHA-1: 888746ae91cd0c9ccfb708917195b8ec6103efeb SHA-256: d9634b71dc0ce38b4095149e00c1e1bd013e62f08532b6d751034c518d4f07d3

120 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates the document is part of a link farm designed to distribute content, with 17 external PDF links found. The primary malicious URL identified is https://ttraff.cc/pify?keyword=8th+grade+math+worksheet+pdf, which is likely used to redirect users to a malicious payload. The document body, though heavily obfuscated, contains text related to '8th grade math worksheet pdf', suggesting a lure to trick users into clicking the malicious link.

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.cc/pify?keyword=8th+grade+math+worksheet+pdf
- http://files.bowerclocks.com/uploads/1/3/1/3/131382470/7872903.pdf
- http://files.littleheathensranch.com/uploads/1/3/1/4/131407284/3074275.pdf
- http://files.noahdeist.com/uploads/1/3/2/6/132695329/zomeloge_wiwegino_welumitogitufu_mixekonegibe.pdf
- http://files.ahbas.org/uploads/1/3/0/8/130814874/21eeee386af5b.pdf
- http://files.safecitysecurity.com/uploads/1/3/0/7/130740127/e88b2.pdf
- https://cdn.shopify.com/s/files/1/0429/9912/0033/files/33509184188.pdf
- https://cdn.shopify.com/s/files/1/0434/1510/9799/files/14841585588.pdf
- https://cdn.shopify.com/s/files/1/0430/8969/0773/files/tesoxi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
- https://cdn.shopify.com/s/files/1/0431/3006/0955/files/siduda.pdf
- https://cdn.shopify.com/s/files/1/0431/1433/2309/files/38979441032.pdf
- https://cdn.shopify.com/s/files/1/0430/8602/0775/files/45056455068.pdf
- https://cdn.shopify.com/s/files/1/0427/6020/8540/files/50085090369.pdf
- https://cdn.shopify.com/s/files/1/0438/3621/1357/files/42277199139.pdf
- https://cdn.shopify.com/s/files/1/0435/1649/3976/files/lanupe.pdf
- https://cdn.shopify.com/s/files/1/0432/0670/5312/files/zafajanoniserebojar.pdf
- https://cdn.shopify.com/s/files/1/0431/7921/2960/files/zawemin.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_off00006d87.bin` `5e9e86f6cba9c8903d6230cd84944daef5590087a61f12cc25d6f2fcb5a92f63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D87	5312 bytes
`font_01_sfnt_off00007fa2.bin` `23922e7d37c90b748810d87134f37f4901ba68de6bfa326cf56bbb43cc049b29`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FA2	10452 bytes

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