PDF malware analysis — malicious · d0f1cd1015c420d5

MALICIOUS

PDF

50.9 KB Created: 2020-08-30 00:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a5b1f464c27c08a0799b3bc11f393257 SHA-1: d7a0ef4c8552f9205198d64b0d860276a1962f79 SHA-256: d0f1cd1015c420d54b966bf1da200b3fae1e3346e3b23a7fad0a506b2fa1d2a0

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a malicious redirector and a link farm, as indicated by the critical heuristic firings. It contains numerous embedded links, with a primary link pointing to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, appears to contain the keyword 'epithelial cells normal range in uri' which is also present in the malicious URL, suggesting a lure. The presence of a large number of external PDF links further supports the link farm hypothesis.

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=epithelial+cells+normal+range+in+uri
- https://cdn.shopify.com/s/files/1/0429/6481/1927/files/bhojpuri_movie_free_2018_hd.pdf
- https://cdn.shopify.com/s/files/1/0429/1585/6550/files/bususenixuwaxizimasinopa.pdf
- https://cdn.shopify.com/s/files/1/0435/1744/4264/files/lowes_battle_creek_mi.pdf
- https://cdn.shopify.com/s/files/1/0437/3551/5290/files/rozivelofuzirekirusu.pdf
- https://static.usrfiles.com/ugd/9ea91e_230fd8afc2d249dda65901382615eaa0.pdf
- https://static.usrfiles.com/ugd/b8c837_f3fe03b5f37441ef8720a6ec74cb2d99.pdf
- https://static.usrfiles.com/ugd/b8c837_41ac5ccd51e14f04a62e0b6039b684e1.pdf
- https://static.usrfiles.com/ugd/96768c_3ae01cf31d514c79855f0b30d01ff78e.pdf
- https://static.usrfiles.com/ugd/b8c837_f19a08d0297b4d2ca063f551266fc3d8.pdf
- https://static.usrfiles.com/ugd/b8c837_bb2549c1709c401083fb11ecd6cbabc9.pdf
- https://static.usrfiles.com/ugd/4b874d_76fc87d71dbd4270a01d23aa6881787b.pdf
- https://static.usrfiles.com/ugd/b8c837_ed20c1791e7246ed816be19494ce6b07.pdf
- https://static.usrfiles.com/ugd/1c8c6c_b3702a51349e4093bc39b34d18ee8ade.pdf
- https://cdn.shopify.com/s/files/1/0432/3953/8851/files/rexuwexorolinugudameduduk.pdf
- https://cdn.shopify.com/s/files/1/0434/9073/8328/files/mostly_harmless_econometrics_angrist_and_pischke.pdf
- https://medlineplus.gov/lab-tests/epithelial-cells-in-urine/
- 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_off00008a95.bin` `63167238b6ae9e2e173aa65c12a65a23e2551019b56aca1ee1de657e094b4a9a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A95	5304 bytes
`font_01_sfnt_off00009c71.bin` `b780a809ac27c93a96d8f2a2c70a2f57a3f154a6ab0e4a03ed5d2434f259dfab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C71	10012 bytes

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