PDF malware analysis — malicious · 497b18a2e3bd6d78

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 18:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c2f8f996ce6011a4b81aa3085578e351 SHA-1: 6d2610d4c63a23559f2d5c720f9c826ea0f9745e SHA-256: 497b18a2e3bd6d7811a6fdf6275f6899f9001af405e8af82df25eaeec10e6477

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF document was flagged as malicious by a machine learning classifier and contains a large number of external links, many of which point to a redirector service. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, and PDF_MALICIOUS_REDIRECTOR_LINK specifically calls out a link to ttraff.com, a known malicious redirector. The document body contains garbled text but includes the URL https://ttraff.com/wix?keyword=anatomy+of+upper+and+lower+limb+pdf, suggesting a lure related to the document's purported content.

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.com/wix?keyword=anatomy+of+upper+and+lower+limb+pdf
- https://static.usrfiles.com/ugd/a86d68_f074f6d33b474c9fac9c97b5106283f3.pdf
- https://static.usrfiles.com/ugd/338562_da2e2419aeca4e179542c4cf9aa451db.pdf
- https://static.usrfiles.com/ugd/b8c837_bc2a8d158dd94335a705d6c1246d6646.pdf
- https://static.usrfiles.com/ugd/b8c837_7a8fc68806234fb794227a31545e13cb.pdf
- https://static.usrfiles.com/ugd/b8c837_2f869a7b646f4d3695666ed249834116.pdf
- https://static.usrfiles.com/ugd/b8c837_d2ed47b51d8f4aab89b7306997f4a98c.pdf
- https://static.usrfiles.com/ugd/7a7fb1_cbabe67fabe14d1aa2e4b667a7178f8c.pdf
- https://static.usrfiles.com/ugd/a48928_64ca49a156734277adf93a6850a72e7f.pdf
- https://static.usrfiles.com/ugd/fc840b_bbdf2495feab47e9a6e5bf53ed1b16b6.pdf
- https://cdn.shopify.com/s/files/1/0434/3096/9511/files/mones.pdf
- https://cdn.shopify.com/s/files/1/0431/9890/6528/files/dirupizoteraxir.pdf
- https://cdn.shopify.com/s/files/1/0436/3495/0304/files/vegotapivedubuli.pdf
- https://cdn.shopify.com/s/files/1/0429/1064/6435/files/7994298947.pdf
- https://cdn.shopify.com/s/files/1/0436/9262/1978/files/39749978723.pdf
- https://cdn.shopify.com/s/files/1/0430/6056/0025/files/51715384657.pdf
- https://cdn.shopify.com/s/files/1/0436/1843/5229/files/best_adblock_android_browser.pdf
- https://cdn.shopify.com/s/files/1/0433/5540/6494/files/ansible_tower_3._4.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_off000065e0.bin` `dca0baac6fa6780484b1ec2b5221bceca1cc3c27e429147b60fa877a1566b31d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65E0	5332 bytes
`font_01_sfnt_off00007806.bin` `3e7f0bd7d47f699c884f8b7dbedc0ed6950f27cf8fa62cf82d702f756de246fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7806	10856 bytes

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