PDF malware analysis — malicious · 9d3cb0f323dba116

MALICIOUS

PDF

35.7 KB Created: 2020-07-31 16:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e8d28818d9179a10112c109fd496f443 SHA-1: 8ece0d3a6cf97416b564bc3db712204ae5ca42fe SHA-256: 9d3cb0f323dba116f01939b5e00a8879f8bb3dd39b0ae93d3689d7bf2f5e552d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=no+type+lyrics+clean'. The document body appears to be obfuscated text, but the presence of numerous links suggests a link farm or phishing lure. No scripts were extracted from this sample.

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.ru/pify?keyword=no+type+lyrics+clean
- http://files.vcstemposium.org/uploads/1/3/2/8/132815318/vezitisuzukozumovu.pdf
- http://files.iriselainecottagebnb.com/uploads/1/3/0/7/130776265/lakubi.pdf
- http://files.samynic.com/uploads/1/3/0/8/130814926/vazole.pdf
- https://cdn.shopify.com/s/files/1/0429/8797/8913/files/piwuveradowamidofafo.pdf
- https://cdn.shopify.com/s/files/1/0431/2141/0210/files/44802996044.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdf
- https://cdn.shopify.com/s/files/1/0437/6929/9098/files/96666257428.pdf
- https://cdn.shopify.com/s/files/1/0427/6885/9303/files/doxupes.pdf
- https://cdn.shopify.com/s/files/1/0430/9581/8397/files/13892978814.pdf
- https://cdn.shopify.com/s/files/1/0433/0881/0398/files/57184490156.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54686169254.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13121593915.pdf
- https://cdn.shopify.com/s/files/1/0431/5168/7848/files/80761135007.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_off00004f39.bin` `092f2f3cdd1c3b561469edbdb8142d233603ce52226a66ec508abeaa09421076`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F39	4996 bytes
`font_01_sfnt_off00006055.bin` `0a75a3f916621f9eb484bc627c9e5e11b5f085ef48a3c0314e17d6ac13edd92b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6055	9864 bytes

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