PDF malware analysis — malicious · 6fb2076345a35c1b

MALICIOUS

PDF

36.4 KB Created: 2020-08-21 00:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a24938109cf6b7b156cc029c7950c8fc SHA-1: d4eb37d73b42957b189f8af4eb94b429d7d00498 SHA-256: 6fb2076345a35c1ba7d0e781cadf8f9c5effe6426f212f29aa35b9cb8b88f30f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The presence of a link farm and a redirector suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=close+up+english+in+use+b2+answers
- http://files.cardiganridge.com/uploads/1/3/1/8/131856276/b800d0630cbc8.pdf
- http://files.lescreationsdana.com/uploads/1/3/1/3/131398573/9655069.pdf
- http://files.smyrnapta.com/uploads/1/3/0/8/130874240/db7bc0f.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0440/3917/6357/files/92757874981.pdf
- https://cdn.shopify.com/s/files/1/0430/2589/1479/files/xodutikujilafaje.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
- https://cdn.shopify.com/s/files/1/0427/8393/2582/files/jibokuragu.pdf
- https://cdn.shopify.com/s/files/1/0434/0501/7253/files/calicut_airport_code_ccu_full_form.pdf
- https://cdn.shopify.com/s/files/1/0431/1908/3677/files/jibifipazugojixiriv.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
- https://cdn.shopify.com/s/files/1/0432/7650/1148/files/56442152880.pdf
- https://cdn.shopify.com/s/files/1/0427/6705/7063/files/92519900885.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_off000050c7.bin` `b29636a340cd2ef01a4275510050277a3eb60393cd33c570d1d3830afd1488ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x50C7	5348 bytes
`font_01_sfnt_off000062f9.bin` `debe026e2639722f6a3781964c4e636b8e6046069b8c7cbfc0d95619c4a5f533`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62F9	10000 bytes

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