PDF malware analysis — malicious · 3fb12cca4c01fa6c

MALICIOUS

PDF

42.3 KB Created: 2020-08-23 21:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 14f874c9b993e2f126f0c71ab5aefaa0 SHA-1: b596b9a6d25488e8b2364c5bf47ccacb90c32dd6 SHA-256: 3fb12cca4c01fa6c2a127ee854bc16fae36e95c1e8d3f7aefca0a0efabb70033

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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=camera+logo+hd+image
- http://files.kayrajay.com/uploads/1/3/1/6/131606165/zawavoxarusim-texuvoze-zutepoval-ruzesasaje.pdf
- https://cdn.shopify.com/s/files/1/0431/0489/5143/files/93534009924.pdf
- https://cdn.shopify.com/s/files/1/0433/1975/4907/files/satofoxe.pdf
- https://cdn.shopify.com/s/files/1/0449/9157/8276/files/bsf_tradesman_application_form_2020.pdf
- https://cdn.shopify.com/s/files/1/0437/2532/4439/files/slope_intercept_form_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0437/6051/7271/files/vba_date_time_format_milliseconds.pdf
- https://cdn.shopify.com/s/files/1/0431/4379/0760/files/97573999305.pdf
- https://cdn.shopify.com/s/files/1/0449/8341/9039/files/nedibegew.pdf
- https://cdn.shopify.com/s/files/1/0437/8116/1111/files/kuvikedirodujawitawufezat.pdf
- https://cdn.shopify.com/s/files/1/0435/5037/6099/files/59420736666.pdf
- https://cdn.shopify.com/s/files/1/0451/8638/4023/files/46426423787.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_off00005945.bin` `7a64e7e4ec5b2d247af336df5b0233542fe5f87fb6c1fcb313c2d82da2d5edcd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5945	4684 bytes
`font_01_sfnt_off00006925.bin` `e00d16322361ce7f093ab6dea0359c941f5e2ed71e81050280bed5401bffc9cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6925	12000 bytes
`font_02_sfnt_off00008eeb.bin` `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EEB	4324 bytes

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