PDF malware analysis — malicious · 536a7dad81bce5e1

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 00:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f3667843569e521e8cf80e621aaa92df SHA-1: 70cd9d81e30bb0ab89ecb47e93c086ed94c86c83 SHA-256: 536a7dad81bce5e1720c927128e82e178d397950e2ddc897f4511e9ee42033b3

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate documents, but one of the primary links redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=alan+lakein+time+management+pdf, which is flagged as a malicious redirector. This suggests the PDF is a lure to redirect users to malicious content, likely for phishing or malware distribution.

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=alan+lakein+time+management+pdf
- https://cdn.shopify.com/s/files/1/0447/1206/7228/files/the_hostage_brendan_behan.pdf
- https://cdn.shopify.com/s/files/1/0437/5016/2581/files/wigos.pdf
- https://cdn.shopify.com/s/files/1/0436/4392/8726/files/logical_reasoning_aptitude_questions.pdf
- https://static.usrfiles.com/ugd/79cb75_aebcc87705ff4d9ca697a2c5bd3f84bd.pdf
- https://static.usrfiles.com/ugd/b8c837_ae99941970e0485da10f56d4a04bda7d.pdf
- https://static.usrfiles.com/ugd/b8c837_757eb45f7b604307b38eaf564db98e1c.pdf
- https://static.usrfiles.com/ugd/837d34_12ddec07954247e4a91be925ff3ef918.pdf
- https://static.usrfiles.com/ugd/b8c837_8417fa4b33b741ca9dab5101dfc5ddc9.pdf
- https://static.usrfiles.com/ugd/b8c837_393e2a683cb545d4a94a2931201a0eaa.pdf
- https://static.usrfiles.com/ugd/cf14a4_76e9bd3faecc4a4f87567125d0b2b822.pdf
- https://static.usrfiles.com/ugd/82e28d_3c20e15d750a44cd899eebb7137a6dc8.pdf
- https://static.usrfiles.com/ugd/405339_197fefa64fe54445b89453bbdcb4f6a8.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_off00006421.bin` `83bf557538503820f6bb11baad3d641dc880d632ae836a5ec9c675a97f83550e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6421	5140 bytes
`font_01_sfnt_off00007590.bin` `27720c302124ee3ef7a3e35dd621da05d3aa47d1cab3d04769b3e76ee34d6f84`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7590	9896 bytes

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