PDF malware analysis — malicious · a0f75249652fbb9d

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 08:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d5c50d2fe26c7ba35913b0605170b2ee SHA-1: 31497e0403a4cd2184fc61f1d90e66838c9594e4 SHA-256: a0f75249652fbb9d45935269e36fdeaf4b21bbb055ba9579233f6e050f5cb6a0

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior with numerous links to external PDFs hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern appears to be SEO manipulation and redirection to malicious infrastructure.

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/pify?keyword=zx+spectrum+games+code+club+pdf
- http://files.myturn2talk.com/uploads/1/3/0/8/130813427/3d3f9374bdce.pdf
- http://files.georgiaamarfineart.com/uploads/1/3/0/7/130775505/1752360.pdf
- http://files.dynamicwisdom.org/uploads/1/3/1/0/131069886/jefamedug-purosuzufatezen.pdf
- https://cdn.shopify.com/s/files/1/0431/7547/7416/files/52760695758.pdf
- https://cdn.shopify.com/s/files/1/0431/0364/9954/files/sunutodokajufuxodijumuf.pdf
- https://cdn.shopify.com/s/files/1/0432/2990/5058/files/achyut_godbole_books_free_download.pdf
- https://cdn.shopify.com/s/files/1/0429/4829/6857/files/44892038300.pdf
- https://cdn.shopify.com/s/files/1/0431/3861/3415/files/budewudaxolid.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdf
- https://cdn.shopify.com/s/files/1/0448/2190/5569/files/62986579101.pdf
- https://cdn.shopify.com/s/files/1/0431/8684/7904/files/53017565012.pdf
- https://cdn.shopify.com/s/files/1/0438/4777/8469/files/gobir.pdf
- https://cdn.shopify.com/s/files/1/0430/7949/9940/files/degitarakeketi.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_off00005d52.bin` `11ab0ed52075594f505a47be0f079ae40366dc3b45be9aa05ed44178d8b67d98`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D52	5640 bytes
`font_01_sfnt_off00007071.bin` `fcb8c4b359a3d6066fa5be54847766b587f2dc8c064121d80ae39847d0b9c03c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7071	10660 bytes

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