PDF malware analysis — malicious · 2e81ffb169172bc0

MALICIOUS

PDF

39.8 KB Created: 2020-09-07 02:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e38bce94c0edc6f9c17c80ee4396ebb9 SHA-1: d30d108896a07b6388c711be31732146d6ca9c10 SHA-256: 2e81ffb169172bc0f2fda5854d5a55bb6836b680d6d5c8d1c388b62638a34cac

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a malicious redirector link disguised as a hiking map. The ML classifier strongly indicated maliciousness, and the PDF was found to link to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs hosted on content farms, suggesting a lure to external malicious content.

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=chamonix+hiking+map
- https://static.usrfiles.com/ugd/fb83f1_96b84b89363a4b8490b3cec7ed67f080.pdf
- https://static.usrfiles.com/ugd/3649d2_688dc3f6d2af47c4b071cf586ec0a083.pdf
- https://static.usrfiles.com/ugd/868b90_14033d5ffc3f4266af803839a2b4e8e4.pdf
- https://static.usrfiles.com/ugd/5899d5_8260fe5b3de845d2b2c69bf323913c1b.pdf
- https://static.usrfiles.com/ugd/de02f3_f3d7fbc3424142fdbca6388572fbbdd6.pdf
- https://cdn.shopify.com/s/files/1/0434/3323/0488/files/heaviside_function_matlab.pdf
- https://cdn.shopify.com/s/files/1/0434/5249/8070/files/wazokafolivotetori.pdf
- https://cdn.shopify.com/s/files/1/0428/2934/9030/files/82048938585.pdf
- https://static.usrfiles.com/ugd/115d6e_46d498e36ff24a238cf3394cd22004c5.pdf
- https://static.usrfiles.com/ugd/6e3131_2e32217a6cb14edd99f261eee8fac711.pdf
- https://static.usrfiles.com/ugd/838e7e_85fbfe9b3c6e423eb374f61bb6bf7e05.pdf
- https://static.usrfiles.com/ugd/6a4619_c63300137164472abfeb611c17240a3f.pdf
- https://static.usrfiles.com/ugd/4cd51e_745ad21a197b4dca89e4711fb71d202f.pdf
- https://static.usrfiles.com/ugd/a13bc2_e03404561dd446bab00c115d87831d0b.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_off00005fe8.bin` `c4598f2d68a7742204b68a81a2157d90e502fee59633f511ef2439ac9ea3fff6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FE8	4964 bytes
`font_01_sfnt_off000070ae.bin` `1a880308a3b9dc78f4a574b1c5b6be65d8222841656ec90da5736a6b09255368`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70AE	9872 bytes

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