PDF malware analysis — malicious · 52087bc162c9dc28

MALICIOUS

PDF

51.2 KB Created: 2020-09-02 03:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 32d77c88a61044273df52db34a6bd0b9 SHA-1: 4c85a672464188947cbce7eeb8f44ade56abcbf8 SHA-256: 52087bc162c9dc283a8799ddaf3cbfba3b3f9492184add0f492d5854c2f54a30

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, predominantly to Shopify-hosted PDFs. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to malicious content. The document body contains obfuscated text and URLs, further supporting the malicious intent.

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/wix?keyword=elementor+theme+templates
- https://cdn.shopify.com/s/files/1/0431/0053/6986/files/diagrama_de_gantt_formato_excel.pdf
- https://cdn.shopify.com/s/files/1/0428/3501/7895/files/vw_t5_camper_conversion_guide.pdf
- https://cdn.shopify.com/s/files/1/0438/4302/7104/files/mikixorunowonularik.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bipifapokuwegi.pdf
- https://cdn.shopify.com/s/files/1/0435/1787/0239/files/84131916331.pdf
- https://cdn.shopify.com/s/files/1/0435/4513/3207/files/grand_babylon_hotel.pdf
- https://cdn.shopify.com/s/files/1/0454/8925/8646/files/zalika.pdf
- https://static.usrfiles.com/ugd/b8c837_564d0250d75146868f5fcd3ad17bf3a9.pdf
- https://static.usrfiles.com/ugd/cc089a_bd271e622eee4b06b8d2addcf6fbd182.pdf
- https://static.usrfiles.com/ugd/696b8a_446aa96a7007488db66e67cf749094e5.pdf
- https://static.usrfiles.com/ugd/e23fbb_004d1656b8684588aa7c40bdcb3f59c0.pdf
- https://static.usrfiles.com/ugd/c12414_af9f332c383248d2959f8eab2c550968.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008c19.bin` `2136f0fe2beb1f127170eeb4067846b701b55663416a4b13b995fa04aa143920`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C19	5016 bytes
`font_01_sfnt_off00009cf4.bin` `6e2ba7d4b18f76dd35ef9c0c6b55a3d6beac71c903cca15e49948fd307e2b419`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CF4	10288 bytes

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