PDF malware analysis — malicious · bbb0c192261b735b

MALICIOUS

PDF

55.1 KB Created: 2020-09-01 11:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0db1ec0aab6426e42f592ad91f6a1e32 SHA-1: 8eb3841b88230cbd9c950846ae3015736d01aa32 SHA-256: bbb0c192261b735b0bb626cae47206faae830f28e3fa74d3537145719eeb1a56

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by a machine learning classifier and contains a link farm with numerous external PDF links. One of the primary links, 'https://ttraff.ru/wix?keyword=the+good+fight+soundtrack', points to known malicious redirector infrastructure. The document body appears to be obfuscated or corrupted, but the presence of multiple links to external PDFs suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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/wix?keyword=the+good+fight+soundtrack
- https://static.usrfiles.com/ugd/79e0dc_680615a3d86f461cbb1e362b4abdf6bd.pdf
- https://static.usrfiles.com/ugd/808d8c_f0e2dba9c9e347c3a91cc74fbc3a6a81.pdf
- https://static.usrfiles.com/ugd/de3d83_708527a781b347c487a1e5d91dfb7719.pdf
- https://static.usrfiles.com/ugd/b8c837_012066c4100a4d72aa42819e8794940d.pdf
- https://static.usrfiles.com/ugd/3e9e83_fa80922c24524a998e064c072ea3444d.pdf
- https://static.usrfiles.com/ugd/b8c837_19264833cbd04ddc9aec8a20a8d52c93.pdf
- https://cdn.shopify.com/s/files/1/0433/8457/0019/files/timujuguvutelu.pdf
- https://cdn.shopify.com/s/files/1/0439/0099/3704/files/blank_answer_key_download.pdf
- https://static.usrfiles.com/ugd/05900a_bea81e1f18814395a7119196ce7dae38.pdf
- https://static.usrfiles.com/ugd/e23fbb_6120024489fe42b18da63f939a530a70.pdf
- https://static.usrfiles.com/ugd/b8c837_6f1532a2c80a424cbfe51b4caba5ce6c.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_off00009aa5.bin` `92aabd116f3f79efc19f315ac3985699ef2edf1baf17078ac81f83611fe6a6ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9AA5	5264 bytes
`font_01_sfnt_off0000ac8c.bin` `7dc0344b7d42323a0260de93eec8319764bfc5557adc58373ba150623dab1dfa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC8C	10408 bytes

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