PDF malware analysis — malicious · cd9cbd701ab8c226

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 03:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f7ba175b09c3e57b2e2d0218753c183f SHA-1: 903cc848bca91617e7d4429696cfe86ac0951d3e SHA-256: cd9cbd701ab8c226bfe17cf7071e0c10137fa94f4759a715dfd38d5a87069100

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=tenants+union+nsw+annual+report`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on `cdn.shopify.com`. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive document, leading users to potentially harmful external sites.

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.ru/pify?keyword=tenants+union+nsw+annual+report
- http://files.skipscards.com/uploads/1/3/0/8/130874050/f0a113.pdf
- https://cdn.shopify.com/s/files/1/0432/8577/4502/files/17065704484.pdf
- https://cdn.shopify.com/s/files/1/0450/4177/8838/files/nj_driving_test_questions_and_answers.pdf
- https://cdn.shopify.com/s/files/1/0427/5427/7532/files/56975465856.pdf
- https://cdn.shopify.com/s/files/1/0437/3233/6792/files/bandura_self_efficacy.pdf
- https://cdn.shopify.com/s/files/1/0431/3900/6632/files/kexokazomog.pdf
- https://cdn.shopify.com/s/files/1/0429/9263/1962/files/79206465176.pdf
- https://cdn.shopify.com/s/files/1/0435/5594/6655/files/autocad_electrical_sample_drawings_free.pdf
- https://cdn.shopify.com/s/files/1/0428/0408/4899/files/tojilovu.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_off00004e0f.bin` `035e012d01a659944bd15d6b6c37238fae433b99e85cbe4f9952cb2930bd16b1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E0F	4856 bytes
`font_01_sfnt_off00005eb3.bin` `7483cfa4d9daaee18e2c472664d5c5db60710b338cefd3e9ddf89f1f72bf6c59`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EB3	10536 bytes
`font_02_sfnt_off000082f9.bin` `a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82F9	16204 bytes

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