PDF malware analysis — malicious · a20f0b407736f404

MALICIOUS

PDF

46.7 KB Created: 2020-07-31 10:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dd7f82130aed8a5425cf3cfa9336f85f SHA-1: cca636c925dbb615e9a95373b383cbd8363f18f1 SHA-256: a20f0b407736f40463a3cd9d93b411ee99a547fe9939a70d685094a68f7d6c74

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. It also contains a PDF link farm heuristic, indicating a large number of outbound links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains text related to 'Cbse board exam date 2020 class 12 pdf', suggesting a lure to disguise the malicious intent. The presence of a download button heuristic further supports a social engineering attack.

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=cbse+board+exam+date+2020+class+12+pdf
- http://files.shopbeneficialbeans.org/uploads/1/3/0/7/130739646/a554c8bb3f5f.pdf
- http://files.threeorbs.net/uploads/1/3/1/4/131438641/1607327.pdf
- http://files.wildemu.com/uploads/1/3/0/8/130813837/nimisesik.pdf
- https://cdn.shopify.com/s/files/1/0431/3058/5250/files/58867864461.pdf
- https://cdn.shopify.com/s/files/1/0436/4579/6512/files/wesemozokusuzufipizoba.pdf
- https://cdn.shopify.com/s/files/1/0431/4434/7802/files/nivaje.pdf
- https://cdn.shopify.com/s/files/1/0435/9127/0563/files/9993651808.pdf
- https://cdn.shopify.com/s/files/1/0431/2072/2080/files/51849807953.pdf
- https://cdn.shopify.com/s/files/1/0434/1586/3452/files/fitisufu.pdf
- https://cdn.shopify.com/s/files/1/0432/1764/9819/files/57529370819.pdf
- https://cdn.shopify.com/s/files/1/0437/7663/9127/files/32681162611.pdf
- https://cdn.shopify.com/s/files/1/0431/5624/2581/files/75210466009.pdf
- https://cdn.shopify.com/s/files/1/0434/6196/8025/files/31571807010.pdf
- https://cdn.shopify.com/s/files/1/0432/8351/3499/files/gezagezuritolegol.pdf
- https://cdn.shopify.com/s/files/1/0433/5131/0488/files/9051579848.pdf
- https://cdn.shopify.com/s/files/1/0434/4155/3575/files/61798323273.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_off000077f5.bin` `379037aec78571a64306132a1711075fb19a78c7e849b8c72a861ba36d4ec54a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77F5	5492 bytes
`font_01_sfnt_off00008aae.bin` `5a7ea29b1acfd1a9935646f1841bdf8ceb725fa5fefddcf94f64dd0053453b9a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AAE	10256 bytes

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