PDF malware analysis — malicious · 0012a19405e0ad02

MALICIOUS

PDF

38.3 KB Created: 2020-09-06 16:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f50c778e518688037c2960717ff6b5ad SHA-1: a3b4a33f40829cc5ffef02de59cf8f594637dd91 SHA-256: 0012a19405e0ad0273ed9eca58db057dcbf803cdcd735685c4940b7eb7a5c50f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to lure users to a malicious site.

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.me/wix?keyword=bestiario+argent+pdf+espa%25C3%25B1ol
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/764aaa_085fea24aa1146f896bf96d9da3a816a.pdf
- https://static.usrfiles.com/ugd/4b874d_407802b06718477b8f2cbc6614a4cdc0.pdf
- https://static.usrfiles.com/ugd/5926b4_74d725b9f96143aa8488cc34b23fdfdc.pdf
- https://cdn.shopify.com/s/files/1/0448/0896/2210/files/money_word_problems_worksheets_for_2nd_grade.pdf
- https://cdn.shopify.com/s/files/1/0432/0657/4240/files/attitude_models.pdf
- https://static.usrfiles.com/ugd/89441e_cca9354f2c7240b190d7761b1fa7098a.pdf
- https://static.usrfiles.com/ugd/67e251_52b5001bb6304eff989e7e7be5c45b0f.pdf
- https://cdn.shopify.com/s/files/1/0435/5126/0823/files/professional_email_template_example.pdf
- https://cdn.shopify.com/s/files/1/0435/6459/7397/files/pub_files_mac.pdf
- https://cdn.shopify.com/s/files/1/0431/8475/0743/files/jugigekigoramodurudoluru.pdf
- https://cdn.shopify.com/s/files/1/0429/3689/3599/files/transition_words_worksheet_fill_in_the_blank.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005612.bin` `949c6d9dde2f1989901f40e21d8cc44c217893229175c8ceeb8c4c3bf1d83737`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5612	5468 bytes
`font_01_sfnt_off00006883.bin` `b130c62d04b582c6316b552c71b932e1197491156acc3dd62bfe5d1633c326a8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6883	10168 bytes

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