PDF malware analysis — malicious · ca24c02adbf139c0

MALICIOUS

PDF

48.2 KB Created: 2020-08-06 03:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a94175eb44b9aa8548a64118ea69e643 SHA-1: 07fd91ce82d4b4b1a1df51eb23885d66d19fba20 SHA-256: ca24c02adbf139c0fe1a061a7dfd509a567c92e0b18a863197418ede7a61e67c

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a prominent link disguised as an admit card download, which redirects to a known malicious infrastructure (ttraff.cc). The document body, though heavily obfuscated, contains the same lure text and URLs. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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=allahabad+state+university+admit+card+2020+pdf+download
- http://files.accountinguci.com/uploads/1/3/0/8/130873907/wafizelov-josekijaze.pdf
- http://files.spiritofsaron.org/uploads/1/3/0/9/130969499/tejadijineze.pdf
- http://files.keniandcait.net/uploads/1/3/0/7/130738991/ferajipamedapom-wiboxi-guzareb.pdf
- http://jutofovod.mankinstudios.com/uploads/1/3/1/8/131856257/jisiziwuzano_kelixesomas_bewapusawapizo_gowigak.pdf
- https://cdn.shopify.com/s/files/1/0440/5755/9190/files/dizedigejewuwojeki.pdf
- https://cdn.shopify.com/s/files/1/0432/8731/4585/files/sanezuj.pdf
- https://cdn.shopify.com/s/files/1/0435/1901/7124/files/74118682715.pdf
- https://cdn.shopify.com/s/files/1/0435/3117/4039/files/gefiwug.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2934473971.pdf
- https://cdn.shopify.com/s/files/1/0435/0319/0180/files/23691190503.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
- https://cdn.shopify.com/s/files/1/0434/5780/6502/files/61260262767.pdf
- https://cdn.shopify.com/s/files/1/0428/5513/7447/files/third_law_of_thermodynamics_nptel.pdf
- https://cdn.shopify.com/s/files/1/0431/8022/8759/files/2401711101.pdf
- https://cdn.shopify.com/s/files/1/0435/6263/1326/files/awg_to_mm.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006e80.bin` `665c5410b91e1897d1e6f245737f8ac2236e3120240c3c49c11f1a4d9d066845`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E80	5932 bytes
`font_01_sfnt_off00008291.bin` `791d650ef5ea7ca114fd24f997783591b4c36190e4f8cc500ba9488d4c08c43a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8291	10012 bytes
`font_02_sfnt_off0000a4ea.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4EA	4324 bytes

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