PDF malware analysis — malicious · d2448bb238c0e63d

MALICIOUS

PDF

45.3 KB Created: 2020-09-02 05:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: da0ca51d8b3e38ab511489dd1e8b4624 SHA-1: d28efce354331cb0ea6b52aecf2ef177861d3a56 SHA-256: d2448bb238c0e63d2312ee993d9ed389fd84f23bb3811458402d25fefe513249

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com). This is indicative of a link farm designed to obscure the final destination and potentially distribute malicious content or conduct phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=terraform+aws+provider+assume+role+example
- https://static.usrfiles.com/ugd/b8c837_a409acdc255f47debc86f2cbc47a36cb.pdf
- https://static.usrfiles.com/ugd/37428b_f94c8d123e4c4884bf6daa4ac00ee017.pdf
- https://static.usrfiles.com/ugd/b8c837_7746f27624a447689928a2356cdaa579.pdf
- https://static.usrfiles.com/ugd/d9d1f5_7dfd6a6ab6e148729b41097e727c8f61.pdf
- https://cdn.shopify.com/s/files/1/0438/4122/4861/files/47468347598.pdf
- https://cdn.shopify.com/s/files/1/0431/0011/1002/files/ginupirijebexelod.pdf
- https://cdn.shopify.com/s/files/1/0434/1317/6469/files/nemedabexigib.pdf
- https://cdn.shopify.com/s/files/1/0433/2093/4558/files/painted_basement_ceiling.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5866669006.pdf
- https://static.usrfiles.com/ugd/d017d5_78b5365c0c8446bdb56ff5cc14eb7b30.pdf
- https://static.usrfiles.com/ugd/7a7fb1_7fc0ae1c879f41f0b7a8fc40578d3f7e.pdf
- https://static.usrfiles.com/ugd/b8c837_32d97ab57f0a47c9ab6851cf43d13cac.pdf
- https://static.usrfiles.com/ugd/41f880_809567f9af6f4a7c895d1d5a4be6bb7a.pdf
- https://static.usrfiles.com/ugd/430cb2_6ff61f59c3a34aed8009c0a1ce69fb09.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_off0000672c.bin` `b783d60c145aa698bd10451d5114fe51be9eb9c1fbf80c614ce9fea67c63031c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x672C	5356 bytes
`font_01_sfnt_off00007968.bin` `ce87048afd2bbf7157d8af096f8988b051751c25857ab2d0833e45862088351e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7968	14632 bytes

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