PDF malware analysis — malicious · 96fd40a73a145849

MALICIOUS

PDF

47.4 KB Created: 2020-08-26 13:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bf4d1bef436fdc049064e1c6729b214a SHA-1: 7d60c671b3a5de53c8643d85a25afe274725d9de SHA-256: 96fd40a73a1458499aa58e9c3cfcd2d084e7116820c2d1f638e261e0ed30ae37

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=loi+de+stefan+boltzmann
- http://files.go4gurus.com/uploads/1/3/0/7/130775832/1623948.pdf
- http://files.hibajaroudi.com/uploads/1/3/2/8/132814958/7cac69627f5ab7d.pdf
- http://files.zenithfitnesstraining.com/uploads/1/3/2/6/132681823/lopisesu.pdf
- http://sigazugej.angellightschool.com/uploads/1/3/0/8/130874655/4905506.pdf
- http://detujose.callihanscache.org/uploads/1/3/1/0/131070420/4778457.pdf
- https://cdn.shopify.com/s/files/1/0434/1697/7559/files/bury_me_standing.pdf
- https://cdn.shopify.com/s/files/1/0438/6629/2389/files/93594665147.pdf
- https://cdn.shopify.com/s/files/1/0432/3645/8654/files/med_surg_made_easy.pdf
- https://cdn.shopify.com/s/files/1/0433/8152/2599/files/list_of_expenses_in_accounting.pdf
- https://cdn.shopify.com/s/files/1/0433/4492/0734/files/wifekaxemixelinil.pdf
- https://cdn.shopify.com/s/files/1/0433/3197/7370/files/49581131667.pdf
- https://cdn.shopify.com/s/files/1/0429/2503/1590/files/95422371344.pdf
- https://cdn.shopify.com/s/files/1/0431/4444/6118/files/bpmn_2._0_handbook.pdf
- https://cdn.shopify.com/s/files/1/0437/5959/9777/files/20873451235.pdf
- https://cdn.shopify.com/s/files/1/0435/4523/1509/files/fezarimufidenur.pdf
- https://cdn.shopify.com/s/files/1/0437/4082/3701/files/european_certificate_of_conformity_ford.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005f3d.bin` `124b810e3cc395d198d3399361f5640da464a39f75b74bde21a9908c9240dca5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F3D	5088 bytes
`font_01_sfnt_off00007082.bin` `06666c110d26359d33be3e1921839da4bfb7ac76e16abdfa8b50fcd4496a52ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7082	13600 bytes
`font_02_sfnt_off00009bf4.bin` `52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BF4	16036 bytes

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