PDF malware analysis — malicious · 6b61a149afc5f176

MALICIOUS

PDF

45.5 KB Created: 2020-08-15 04:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 395d56c69dc6ba59c5ce63cb795095e9 SHA-1: cda547df78ebb58de63fcaef40c5c3c5cfa27c91 SHA-256: 6b61a149afc5f17678dbe2ce3d52ff9855800ed59f5a622bd85c2a0edae8cd34

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a large number of external links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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/pify?keyword=choo+choo+song
- http://siwiwus.sacredheartsisters.org/uploads/1/3/0/8/130874049/78a276df84.pdf
- http://geralelem.kimstravelers.com/uploads/1/3/0/8/130814328/2930296.pdf
- http://files.bethuneandson.com/uploads/1/3/1/3/131397996/belinurekoj.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/8179/3698/files/open_all_interiors.pdf
- https://cdn.shopify.com/s/files/1/0432/8354/6267/files/banekizulanuledemokizad.pdf
- https://cdn.shopify.com/s/files/1/0432/8351/3494/files/87248867500.pdf
- https://cdn.shopify.com/s/files/1/0439/2534/0328/files/bokevamobuwokupiz.pdf
- https://cdn.shopify.com/s/files/1/0453/6093/9163/files/71276033515.pdf
- https://cdn.shopify.com/s/files/1/0438/5413/5456/files/jump_the_shark_website.pdf
- https://cdn.shopify.com/s/files/1/0440/2970/6390/files/edible_mushrooms_list.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wimuwukewamofese.pdf
- https://cdn.shopify.com/s/files/1/0435/3415/5928/files/ratofuxuzoxivuj.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_off000076db.bin` `e4d0707e8c118d0cd72af4542cff970908263605bb3cdc99636fad87e5e9345f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76DB	4628 bytes
`font_01_sfnt_off00008698.bin` `2ba5ee3eb3702d744da470ca1a75bbc3de539916684567c19d5c6b801ebf7af7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8698	10240 bytes

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