PDF malware analysis — malicious · 18e2c672f68189d5

MALICIOUS

PDF

38.5 KB Created: 2020-08-30 03:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3e21197efc3f47817d6a1e04a95f3097 SHA-1: 631d85e9770542fcf0c01b03bf74eb53046b99f8 SHA-256: 18e2c672f68189d5636654099692166e7f23dd174e183d739be61fc353591db9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a user manual, which redirects to a known malicious domain. The presence of numerous external links, many pointing to Shopify, suggests a link farm designed to obscure the true destination. The ML classifier also strongly indicated maliciousness.

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=zanussi+washing+machine+user+manual
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/5346/6271/files/93367390306.pdf
- https://cdn.shopify.com/s/files/1/0429/0484/6503/files/20215826847.pdf
- https://cdn.shopify.com/s/files/1/0429/9515/5105/files/darinimojij.pdf
- https://cdn.shopify.com/s/files/1/0437/6153/3082/files/68715714796.pdf
- https://cdn.shopify.com/s/files/1/0438/0744/1053/files/lightroom_cc_shortcuts.pdf
- https://static.usrfiles.com/ugd/57c819_16cc0e81d3784c10b678b642684e136f.pdf
- https://static.usrfiles.com/ugd/b8c837_db9b540fbbe147f8a512187bec583164.pdf
- https://cdn.shopify.com/s/files/1/0430/0275/7281/files/wojudo.pdf
- https://cdn.shopify.com/s/files/1/0432/1250/5252/files/44308219164.pdf
- https://cdn.shopify.com/s/files/1/0433/9689/0785/files/ejercicios_clases_de_sustantivos_4_primaria.pdf
- https://cdn.shopify.com/s/files/1/0462/4475/7664/files/67129698704.pdf
- https://cdn.shopify.com/s/files/1/0436/6280/3097/files/kigijewikimikowufejiviza.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_off0000524f.bin` `fefd37671af9b638813530a627f4ade309bddb50026c3fe50e11c13b4f9fc13f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x524F	5260 bytes
`font_01_sfnt_off00006419.bin` `17206d35b2cb2c560bf470d0f553acc498a984574ef431d2124f0bf30d1f8f6c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6419	12900 bytes

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