PDF malware analysis — malicious · a1c04e0b26a973e5

MALICIOUS

PDF

42.9 KB Created: 2020-09-04 21:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b3f06190aef3212d36c7e663295d0022 SHA-1: 2656d95d855ff39c2137ecf1433b83f44aae5902 SHA-256: a1c04e0b26a973e5a8a2b6cd8fc14e6e694771565800ef04771727764ac03a0a

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=firechat+android+app+free'. This URL is part of a link farm, as indicated by another critical heuristic. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking Shopify URL, suggesting a lure to download an app. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=firechat+android+app+free
- https://cdn.shopify.com/s/files/1/0431/8560/2721/files/46401145856.pdf
- https://cdn.shopify.com/s/files/1/0431/5843/8039/files/kulekimokojukonaxubu.pdf
- https://cdn.shopify.com/s/files/1/0446/6517/6217/files/61388424016.pdf
- https://cdn.shopify.com/s/files/1/0438/9847/0555/files/mesiwisuzif.pdf
- https://cdn.shopify.com/s/files/1/0430/1576/6177/files/sagosinipopixasini.pdf
- https://cdn.shopify.com/s/files/1/0438/8998/3640/files/jutabolojaw.pdf
- https://cdn.shopify.com/s/files/1/0431/3333/7768/files/publicity_and_public_relations_in_marketing.pdf
- https://cdn.shopify.com/s/files/1/0430/9388/5089/files/calisthenics_workout_no_equipment.pdf
- https://cdn.shopify.com/s/files/1/0437/6562/9077/files/88749130448.pdf
- https://static.usrfiles.com/ugd/aef5b7_ff0cdf795fed493fb8dc7461caea714a.pdf
- https://static.usrfiles.com/ugd/23924c_b594845ee51b4256b3d215861d357415.pdf
- https://static.usrfiles.com/ugd/63f22d_982efacabde74c958359ee47d067c2cb.pdf
- https://static.usrfiles.com/ugd/a107db_1acd2dc6982d473c86b29f69dd5b9056.pdf
- https://static.usrfiles.com/ugd/b8c837_9589c71ba4a94a61961b9f4a1185791f.pdf
- https://static.usrfiles.com/ugd/a1fb72_7290be94f98047a086006bd99c49f5af.pdf
- https://static.usrfiles.com/ugd/9b5f63_ec34fab1341a4dd2bdbe0040852d6c70.pdf
- https://static.usrfiles.com/ugd/c4b402_3449717bfcb0436b92050b8eaa9b6e38.pdf
- https://static.usrfiles.com/ugd/cc14e4_ac91c9c4f20a4f718204d5c563e87ca3.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_off00006bc1.bin` `91c8bde67052205044913afff4b623286bd81942a8f243d867388417f9bb848a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BC1	4988 bytes
`font_01_sfnt_off00007cb5.bin` `6d45d9dff63aff5edcfa476a96d7c84483bd75ca117916a21d7201ea7043aefd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CB5	9788 bytes

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