PDF malware analysis — malicious · 0775e63b312812e5

MALICIOUS

PDF

37.7 KB Created: 2020-08-30 19:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9298110f4f723db8c5f95cb9a710dcfb SHA-1: 1e5d73505be7172193ec9366d7a10b5258039c7b SHA-256: 0775e63b312812e5dbaf6c1a6b78b984e4877fe6401a317cd57e75ff0473bc5f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, forming a link farm, with the primary malicious redirector being https://ttraff.me/wix?keyword=limites+con+funciones+trigonometricas. This suggests a phishing or scam attempt designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=limites+con+funciones+trigonometricas
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/7007/0690/files/que_es_anestesia_local.pdf
- https://cdn.shopify.com/s/files/1/0435/3140/3413/files/72016149617.pdf
- https://cdn.shopify.com/s/files/1/0430/8038/4674/files/photographing_the_southwest.pdf
- https://cdn.shopify.com/s/files/1/0432/2312/2077/files/65349580322.pdf
- https://static.usrfiles.com/ugd/b42fd6_8bacc97deb034291b6da62d7af4cb9fb.pdf
- https://static.usrfiles.com/ugd/b8c837_3297023679d549498317115d8b4c9a26.pdf
- https://static.usrfiles.com/ugd/3f4b99_52f9704c618c43d18a537ecb9a135e5f.pdf
- https://static.usrfiles.com/ugd/b8c837_75d1173e542945999801552c61de60e9.pdf
- https://static.usrfiles.com/ugd/913720_6cdb1ad7df5e45698b07ade448ac16a9.pdf
- https://static.usrfiles.com/ugd/b8c837_f62a8d606c314b7dadde0fff054d4273.pdf
- https://static.usrfiles.com/ugd/be19e1_bc96f524fec54426a7c2e2d24b38c240.pdf
- https://static.usrfiles.com/ugd/e2f7e1_b73cfff7bd164eed9956a466d3b168b6.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_off00004bec.bin` `82b010afd5a7501098dabcc92690043482a1c0cb19656ea05f325164a6d3ba2e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4BEC	5108 bytes
`font_01_sfnt_off00005d37.bin` `54208e70a74f244b37ed3767e88e1d507104a2fce5b462d56078824d9e5a92aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D37	14020 bytes

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