PDF malware analysis — malicious · 1605ba009e4cbd3d

MALICIOUS

PDF

40.6 KB Created: 2020-09-29 18:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cffadbf3e5fce0dcd2354cd112d32a31 SHA-1: d6e5f914dfa4801321932bf4416c4545fb8a0681 SHA-256: 1605ba009e4cbd3df35a13fba791776694b011e294f3eb63f0fec5318570f4d9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL of the malicious redirector, suggesting an attempt to trick users into visiting it. The ML classifier strongly indicates maliciousness, and the presence of a link farm points towards SEO poisoning or a phishing lure.

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://cctraff.ru/strik?keyword=pemeriksaan+ballard+score+pdf
- http://files.jennysdelights.com/uploads/1/3/1/1/131164476/d69aad3d476.pdf
- http://tufowo.katiebielefeld.com/uploads/1/3/1/8/131856713/3795163.pdf
- http://files.theapostoliccommunion.org/uploads/1/3/1/0/131070792/6551103.pdf
- http://dosozogaz.goldaes.com/uploads/1/3/1/3/131378950/606088.pdf
- http://files.katoutofbag.com/uploads/1/3/0/7/130739204/lobomuwonamawaded.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/6975/7850/files/angry_babies_malayalam_movie_songs_free.pdf
- https://cdn.shopify.com/s/files/1/0430/7304/4634/files/life_cycle_of_a_bear_ks2.pdf
- https://cdn.shopify.com/s/files/1/0433/3391/0681/files/vosojofikumodavonosijaga.pdf
- https://cdn.shopify.com/s/files/1/0433/5029/4687/files/medios_de_produccion_feudalismo.pdf
- https://uploads.strikinglycdn.com/files/5825571d-dc19-4c10-81fe-95e765cead78/dukonagugiboxopivifizorog.pdf
- https://uploads.strikinglycdn.com/files/62e1bee1-3785-4b9f-add3-ea132fe8fcdd/gixiwamijupemugitorawavaj.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_off0000603c.bin` `7751bd04924c3f7d8ea995d1f11907921ce8623e1f0c4356140c1149a5c92923`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x603C	5504 bytes
`font_01_sfnt_off000072da.bin` `d55e34ec84bb2b0cdd61bb3b5e4e3107b0fda6174c9088d91c448d32d49a5a42`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72DA	10316 bytes

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