PDF malware analysis — malicious · 6e98dfd21a56d527

MALICIOUS

PDF

40.2 KB Created: 2020-08-31 08:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 51b748cb4b102c2e52f752258bffaf24 SHA-1: 6db6796bd83fab919f2a9743f53dd0ea810a0cf8 SHA-256: 6e98dfd21a56d52797f0c20ab04352d14070150355b2bdb1719564eb27b8aeaf

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm designed to manipulate search engine results. One of the primary links redirects to a malicious URL, indicating a phishing or malware distribution attempt. 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=copper+chef+recipe+book+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_73307b1636554efd9771da5da787b259.pdf
- https://static.usrfiles.com/ugd/b8c837_255cab9218ea446897b28ca64baf0d1b.pdf
- https://static.usrfiles.com/ugd/df4650_21853d9571304677b1cd053325e66c2a.pdf
- https://static.usrfiles.com/ugd/e4ff69_8d074f93e5154382af3fd33559ff98e1.pdf
- https://static.usrfiles.com/ugd/7f16bd_a65f1f44bd9d492f8253d2e2287dd0d6.pdf
- https://static.usrfiles.com/ugd/a298ce_26683aeed148476bb95e61a99198217d.pdf
- https://cdn.shopify.com/s/files/1/0432/6070/6971/files/river_city_ransom_food_guide.pdf
- https://cdn.shopify.com/s/files/1/0439/4775/3640/files/bogekoxapor.pdf
- https://cdn.shopify.com/s/files/1/0461/6752/3491/files/ver_pelicula_destino_final.pdf
- https://cdn.shopify.com/s/files/1/0431/8996/0865/files/titan_quest_haruspex_build.pdf
- https://cdn.shopify.com/s/files/1/0434/2887/2341/files/hello_hello_bolke_song.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_off0000600b.bin` `7098a94a755092dc60b46fb9981db53bef110017eeaa9c5db56df8b365c3bd78`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x600B	4932 bytes
`font_01_sfnt_off000070c2.bin` `761fa160e0a2b3cbcd0f7398c6a74fca19c19ba37b299db82ff9508a5aedc473`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70C2	10540 bytes

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