PDF malware analysis — malicious · ddd501afb6e8ac05

MALICIOUS

PDF

83.3 KB Created: 2020-09-07 16:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c8ce07889f5cb0b4655794d0bdc3ff5f SHA-1: 1adf96ddc7206ebb79279176851c2fa679560243 SHA-256: ddd501afb6e8ac05f23ff692e3f01f7243f77b56dfac706042b7311d2733a85b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL points to 'https://ttraff.cc/wix?keyword=informatica+interview+questions+and+answers+dwbi', which is likely used to redirect the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=informatica+interview+questions+and+answers+dwbi
- https://cdn.shopify.com/s/files/1/0429/0645/2127/files/pemuba.pdf
- https://cdn.shopify.com/s/files/1/0432/7417/4622/files/7_wonders_of_the_ancient_world.pdf
- https://cdn.shopify.com/s/files/1/0433/8404/5719/files/19240527990.pdf
- https://static.usrfiles.com/ugd/017c44_44a6dd7488a64720a86183b37fd0a705.pdf
- https://static.usrfiles.com/ugd/b8c837_6ea50097fd1344778fc09c232cb3b066.pdf
- https://static.usrfiles.com/ugd/451a43_e3a16294afeb43d49677dafb61f3a7e3.pdf
- https://static.usrfiles.com/ugd/b8c837_dde8d2c32830414096a45273f73a64fa.pdf
- https://cdn.shopify.com/s/files/1/0435/7462/4419/files/angular_5_data_binding_form.pdf
- https://cdn.shopify.com/s/files/1/0436/5497/1557/files/cost_accounting_formulas_with_examples.pdf
- https://cdn.shopify.com/s/files/1/0430/4224/2709/files/zasivofimafa.pdf
- https://static.usrfiles.com/ugd/585b1d_14241a37bedc41ed9fddb5f45b6c5b2d.pdf
- https://static.usrfiles.com/ugd/0ebc1f_0378d96aa5954ec39516c26aee880450.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_off00010165.bin` `7d197bea1eb758d8dff388ac3de237a0dd5298e245fa692eb616708fa5313c04`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10165	5488 bytes
`font_01_sfnt_off0001140a.bin` `e12ff88e4ba7862371cded0fbef781ff223cab5482fef5a294eff89c0c01a80b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1140A	13904 bytes

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