PDF malware analysis — malicious · a4f23046a118e883

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 00:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 84a15065aa45d3bc44c638819752e4ff SHA-1: 0d5cc095d68e482d06d52ff0e5ab9a5067bf1aef SHA-256: a4f23046a118e88382d97017e90bb877ce6f72f0790d8a60bd42e49a7d81f6d1

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector URL. The document body, though heavily obfuscated, contains text that appears to be a title and authoring information for a textbook, likely serving as a lure. The primary malicious URL is https://ttraff.cc/wix?keyword=college+mathematics+for+business+13t, which is likely used to redirect the user to a malicious site or download further payloads.

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/wix?keyword=college+mathematics+for+business+13t
- https://static.usrfiles.com/ugd/3826db_c556f81796d8451aae546bf95df48f1f.pdf
- https://static.usrfiles.com/ugd/1cfe37_2bfe4d113a0e431391fd28aceb5e2d6a.pdf
- https://static.usrfiles.com/ugd/b8c837_377eb5b8a1364edd89a3078e171b4596.pdf
- https://static.usrfiles.com/ugd/b8c837_827da922098545088a16e3430e65f54c.pdf
- https://static.usrfiles.com/ugd/b91566_baef45807e5940679985391044181260.pdf
- https://static.usrfiles.com/ugd/b8c837_0d398b0f79434bf4ac344646bc9b8364.pdf
- https://static.usrfiles.com/ugd/b8c837_686d7e1507834feaa6062da4f1634f69.pdf
- https://static.usrfiles.com/ugd/b9801a_a8dc462d47d24724933fa1a8cff7c5cf.pdf
- https://static.usrfiles.com/ugd/3b7182_eb513e9d47da4e978c64d4b3bde0362a.pdf
- https://static.usrfiles.com/ugd/b8c837_6dada1dcff33497a9e03ed2b0f4820b9.pdf
- https://static.usrfiles.com/ugd/05900a_088566f59d084e25a72ca0332dc353de.pdf
- https://static.usrfiles.com/ugd/b8c837_dac20c1629db4edea42acf905b7e44bf.pdf
- https://static.usrfiles.com/ugd/8b9728_2ae9427f788b4384afdd50279502f1ba.pdf
- https://static.usrfiles.com/ugd/b8c837_f84d2f88bed544ebb462f78212e9dd0a.pdf
- https://cdn.shopify.com/s/files/1/0433/9302/4149/files/29318578767.pdf
- https://cdn.shopify.com/s/files/1/0461/7512/5667/files/9585782621.pdf
- https://cdn.shopify.com/s/files/1/0433/9469/5329/files/85310947427.pdf
- https://cdn.shopify.com/s/files/1/0450/1300/8534/files/65744181385.pdf
- https://cdn.shopify.com/s/files/1/0433/6510/5814/files/amitriptilina_bula_anvisa.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_off00005fbd.bin` `c32191ddc87119e556e267a4385028443df958642326c0769e22dc7784ee2165`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FBD	5556 bytes
`font_01_sfnt_off0000728d.bin` `b0abbf3ddeddbccec4a956285ed41f6704df868efdb19a396595439094bd8a9b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x728D	9704 bytes

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