PDF malware analysis — malicious · 099a185fa9c79f84

MALICIOUS

PDF

41.5 KB Created: 2020-08-25 15:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f3a11975a8f83d1bd4255335adbbe0b6 SHA-1: 0e8f3026ae342cb33e17e4435b967f194ed40940 SHA-256: 099a185fa9c79f843bdc457cf227969e8977d1d01d26aab8dd4eab0845660584

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 pointing to 'https://ttraff.com/pify?keyword=neurology+app+android'. This suggests the document is designed to lead users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=neurology+app+android
- http://files.grinnellsaddleclub.com/uploads/1/3/1/0/131069860/wabudol-zosiveson.pdf
- http://files.mckennypto.org/uploads/1/3/0/7/130739621/tokuzozotirotelux.pdf
- http://limopimi.orangehistory.org/uploads/1/3/1/3/131384771/biwivuwiw.pdf
- http://karafiwo.aranyaniyoga.com/uploads/1/3/0/7/130739173/12773aaa547.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/9577/5650/files/bakivoxupalemuganol.pdf
- https://cdn.shopify.com/s/files/1/0428/9455/7350/files/pokujagikem.pdf
- https://cdn.shopify.com/s/files/1/0428/3393/6547/files/rabopip.pdf
- https://cdn.shopify.com/s/files/1/0434/5993/6421/files/88237961636.pdf
- https://cdn.shopify.com/s/files/1/0433/8260/3927/files/how_to_download_streaming_video_chrome.pdf
- https://cdn.shopify.com/s/files/1/0433/7369/1045/files/what_is_a_8862_form.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.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_off00006613.bin` `3ef8b28a6cd3b05e26f5bb5a4eef466965473e592bba3a32b57ae289809cb210`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6613	5020 bytes
`font_01_sfnt_off0000773f.bin` `096bdb3af172ae50c41b6aab8e491a1d5f009b7243acad35a07bc383ec3bad3a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x773F	9980 bytes

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