PDF malware analysis — malicious · df1ce2006753c7ab

MALICIOUS

PDF

41.3 KB Created: 2020-08-28 10:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d638b3b343cd74783e829d334970dd69 SHA-1: a6805fe9b44d3134dbc2768f8fe231d1b23fdd50 SHA-256: df1ce2006753c7abdc3fc6f38a538777f2f82ff3d530a8664fa64c2ea18aa1be

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes a URL that matches the malicious redirector found in the heuristics. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.club/pify?keyword=historietas+de+mafalda+sobre+a+tecno
- http://files.tyardwyn.co.uk/uploads/1/3/1/4/131482819/zajareraraw.pdf
- https://cdn.shopify.com/s/files/1/0436/3000/2336/files/eod_armored_vehicle.pdf
- https://cdn.shopify.com/s/files/1/0429/7608/4117/files/53536361745.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
- https://cdn.shopify.com/s/files/1/0427/9874/3719/files/wegufoxorexizazukor.pdf
- https://cdn.shopify.com/s/files/1/0434/0344/4380/files/all_saints_academy_school_uniform.pdf
- https://cdn.shopify.com/s/files/1/0436/0175/6323/files/legend_of_zelda_nes_strategy_guide.pdf
- https://cdn.shopify.com/s/files/1/0431/7675/5349/files/wifiwa.pdf
- https://cdn.shopify.com/s/files/1/0432/8944/4510/files/sepulak.pdf
- https://cdn.shopify.com/s/files/1/0440/4533/6741/files/is_insurance_information_protected_by_hipaa.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005411.bin` `46cd3b051f6171e2d149bdbf7b980b9ae2d3f8e1040eb5bfcfebac92a164e284`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5411	5056 bytes
`font_01_sfnt_off0000651b.bin` `2899940fa500cbfa2abccf9e5cd7d0b5a1f491192e3c67567c64e8577841af61`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x651B	11076 bytes
`font_02_sfnt_off000088f7.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88F7	4324 bytes

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