PDF malware analysis — malicious · 6a2de5afeeb1a163

MALICIOUS

PDF

43.8 KB Created: 2020-09-09 01:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a105b6e4d3688cb050e71060d00b4b74 SHA-1: 5e8fbad82d85504195c95b8104f1d672c68eea4f SHA-256: 6a2de5afeeb1a163fd00081716de92038b18f5d7535ed93cee368671c167d491

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL for this redirector, suggesting an attempt to drive traffic to malicious infrastructure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to lead the user 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.me/wix?keyword=layout+templates+for+asp.+net+mvc
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/89064d_0d0cde4065c04f0a9c018eecd58a9307.pdf
- https://static.usrfiles.com/ugd/9f6a24_5720310c222e4ba3bdd5c40915e4da62.pdf
- https://static.usrfiles.com/ugd/85c99c_3fa64071711f4269877fb595dd6a1260.pdf
- https://static.usrfiles.com/ugd/b88e3d_17e0406d44cf462887eeee6b64ec0ecf.pdf
- https://static.usrfiles.com/ugd/4bb894_5fa2fd267c8c4afa818b8fd59165070c.pdf
- https://static.usrfiles.com/ugd/8ac1ab_a770e0c81ea6451783da4d744d172661.pdf
- https://cdn.shopify.com/s/files/1/0435/7039/7352/files/96120991646.pdf
- https://cdn.shopify.com/s/files/1/0433/9394/1671/files/after_effects_intro_templates_shareae.pdf
- https://cdn.shopify.com/s/files/1/0430/3349/3658/files/zomonokemotumixobixu.pdf
- https://cdn.shopify.com/s/files/1/0432/6939/0500/files/61453772562.pdf
- https://cdn.shopify.com/s/files/1/0432/8187/5104/files/71313001291.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_off000060a9.bin` `84f8aceee5d8a50219f353583f5bccada1562f9535d6a586bff089a77aa21ced`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60A9	5296 bytes
`font_01_sfnt_off000072af.bin` `eb000abd8c7822e27c033c0627e7ac679fe17d8b1a2170767bbf66227822fd88`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72AF	15388 bytes

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