PDF malware analysis — malicious · 5443f13e4631d69b

MALICIOUS

PDF

41.4 KB Created: 2020-09-02 05:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d3d103479ddf7c595c724539e4b8ac88 SHA-1: 57f5a2dc23a65fbfd39278ab37e53df1f34fc5c1 SHA-256: 5443f13e4631d69ba45533b5ebfbbe59ab4c48b747d84198d1fbbadc239829ed

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=logic+games+android'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of a PDF link farm heuristic further indicates a malicious intent to distribute links. 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.me/wix?keyword=logic+games+android
- https://cdn.shopify.com/s/files/1/0432/3049/4878/files/fotafami.pdf
- https://cdn.shopify.com/s/files/1/0432/2105/7700/files/dopasojogikizujateras.pdf
- https://cdn.shopify.com/s/files/1/0445/3181/0463/files/parasitoids_behavioral_and_evolutionary_ecology.pdf
- https://static.usrfiles.com/ugd/6cfc61_c22e7c0982414eabb95724d2ccb1645b.pdf
- https://static.usrfiles.com/ugd/fa6f14_1d9dbf7b00414149bbfcb2bc5f9c138e.pdf
- https://static.usrfiles.com/ugd/5ecadc_31d1ecdb451e4abea53dcc022bf38395.pdf
- https://static.usrfiles.com/ugd/8b2c09_f0cd22c1d709423c893a5de563a24f12.pdf
- https://cdn.shopify.com/s/files/1/0433/2604/6362/files/regoleboxomoxupumitisan.pdf
- https://cdn.shopify.com/s/files/1/0434/5479/1832/files/60467276366.pdf
- https://cdn.shopify.com/s/files/1/0434/5892/0610/files/77252379417.pdf
- https://static.usrfiles.com/ugd/6cf392_90df1661d9fb4b3b8e8f404168194175.pdf
- https://static.usrfiles.com/ugd/b8c837_0ed75cfebe6046b6a65ea0b82b94befb.pdf
- https://static.usrfiles.com/ugd/cb5dea_e10ef08bd5524202b5161b9055f7354f.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_off00006491.bin` `2ed557c058701b843a018cb2c04cba3031ea2beebe648b9c35ba08dc01f74dfb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6491	5168 bytes
`font_01_sfnt_off00007616.bin` `eb87936bf415f9735818e0fcb994014658cf54a4b960c10e0450126603c7dcab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7616	10260 bytes

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