PDF malware analysis — malicious · 0138847925a56b5f

MALICIOUS

PDF

36.7 KB Created: 2020-09-02 00:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4da92c83b5775e476cf44d821797e633 SHA-1: fc951dae33fcf877fb356b4c9f9a488777b934bc SHA-256: 0138847925a56b5f120b4c0a0e5478b906d2beae92c644636715f50c72f55917

154 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 of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'polo mockup psd free'. This suggests the document is designed to trick users into visiting malicious sites by masquerading as a useful file.

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.cc/wix?keyword=polo+mockup+psd+free
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/07ef24_2230d7bf912d42a6933c016e625d7e1c.pdf
- https://static.usrfiles.com/ugd/f1780b_85317c81c9394ee2963d812333209e6a.pdf
- https://static.usrfiles.com/ugd/4f92c1_1b1d9659195748f5a7b924eba1038add.pdf
- https://static.usrfiles.com/ugd/73c254_36080aa9cfc445cabb19d9860e00f13b.pdf
- https://cdn.shopify.com/s/files/1/0435/3441/8072/files/90849614364.pdf
- https://cdn.shopify.com/s/files/1/0437/2480/0154/files/vupisir.pdf
- https://cdn.shopify.com/s/files/1/0436/9124/5733/files/25507599545.pdf
- https://cdn.shopify.com/s/files/1/0429/2155/8183/files/twitter_feed_discord_bot.pdf
- https://cdn.shopify.com/s/files/1/0429/2198/4166/files/tijofefepixa.pdf
- https://static.usrfiles.com/ugd/b8c837_f2569b161aa84c88860415f8f74c45e8.pdf
- https://static.usrfiles.com/ugd/909b15_bc9892b75ef24ae789f106c94cce1407.pdf
- https://static.usrfiles.com/ugd/37321e_63b52769a4fd4fcfad768b341dfe6587.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_off000053be.bin` `75760dcbe096fa71d1ca35d2899cc9359ef60a6035c1333d6ce6ad291c4d6f2f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x53BE	5156 bytes
`font_01_sfnt_off00006537.bin` `51b49244cec05f59ec9d6b0041eab55c1ca545c2023149ce1c7e12496e002827`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6537	9788 bytes

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