PDF malware analysis — malicious · e37ddb9b52590507

MALICIOUS

PDF

32.6 KB Created: 2020-08-21 10:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2b23d26c217462973e2d5dd68bb74353 SHA-1: b50dea99a456515aa57c2146639e512cedc3d710 SHA-256: e37ddb9b525905073aab6093db0b96a89ebefd4069de38e0f31d811ad28f84e5

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous embedded links, a common tactic for distributing malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to ttraff.com, indicating a redirection to potentially harmful infrastructure. The PDF_SEO_LINK_FARM heuristic further supports this by identifying a large number of external links, many hosted on Shopify, which are likely used to obscure the true destination or to create a link farm for SEO manipulation. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates malicious intent.

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=multiplying+fractions+worksheets+tes
- http://files.momhustleology.com/uploads/1/3/0/9/130970001/3547281.pdf
- http://files.whollyimagination.com/uploads/1/3/0/8/130813667/8911838.pdf
- http://files.skylarkadventures.com/uploads/1/3/0/7/130739970/gagivewedur.pdf
- https://cdn.shopify.com/s/files/1/0450/5144/5400/files/free_telugu_astrology_book_download_birth_chart.pdf
- https://cdn.shopify.com/s/files/1/0427/7311/9143/files/foxalir.pdf
- https://cdn.shopify.com/s/files/1/0434/1678/0956/files/bloat_in_cattle.pdf
- https://cdn.shopify.com/s/files/1/0429/1290/7427/files/febabetunajisivuvumuxilis.pdf
- https://cdn.shopify.com/s/files/1/0431/3822/0181/files/tizafezivora.pdf
- https://cdn.shopify.com/s/files/1/0427/9340/2534/files/87671030813.pdf
- https://cdn.shopify.com/s/files/1/0430/7261/8657/files/canot_get_to_recovery_server.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_off00004293.bin` `98be4ac1d49603f0b1b8e359db34079092c477e71b818a33b790b4e4a3902072`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4293	5540 bytes
`font_01_sfnt_off00005583.bin` `9f110a85429b07e6a332705a1144231fc697bbde3de3871141e52220b3e2b03d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5583	9508 bytes

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