PDF malware analysis — malicious · 1f43a83862e5da03

MALICIOUS

PDF

80.1 KB Created: 2020-08-04 18:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 96ad9dcaa1573238a7629578468fc255 SHA-1: f0fc20afc9b385073a1a73508df28cb80d32c9f5 SHA-256: 1f43a83862e5da037bb72086cb3e307282fee3e37c4bbe4741a288654106fa30

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=jurnal+skripsi+akuntansi+perpajakan+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same academic-related keyword as the malicious URL, suggesting a lure. The ML classifier 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.ru/pify?keyword=jurnal+skripsi+akuntansi+perpajakan+pdf
- http://files.kut-snake.com/uploads/1/3/1/4/131453724/xobomenukokapa.pdf
- http://files.teslniagara.org/uploads/1/3/2/3/132302859/00b1f3936a0a.pdf
- http://files.armleydancestudios.com/uploads/1/3/2/3/132302924/d0eaac3cdd2.pdf
- http://files.suitelifeonsas.com/uploads/1/3/1/3/131381352/mafilajo-jaxusizopus-digin.pdf
- https://cdn.shopify.com/s/files/1/0430/7845/1351/files/35039578614.pdf
- https://cdn.shopify.com/s/files/1/0435/0600/8216/files/73331100369.pdf
- https://cdn.shopify.com/s/files/1/0430/0885/2117/files/18838823873.pdf
- https://cdn.shopify.com/s/files/1/0436/1961/4882/files/xumuzexugeropo.pdf
- https://cdn.shopify.com/s/files/1/0428/6627/8556/files/wowagomelutesodewepu.pdf
- https://cdn.shopify.com/s/files/1/0430/1769/9477/files/73775057763.pdf
- https://cdn.shopify.com/s/files/1/0433/4141/4552/files/38181991382.pdf
- https://cdn.shopify.com/s/files/1/0432/0775/3888/files/51920435996.pdf
- https://cdn.shopify.com/s/files/1/0431/9353/2573/files/darogekepivofijitije.pdf
- https://cdn.shopify.com/s/files/1/0431/2625/9876/files/44132010771.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
- https://cdn.shopify.com/s/files/1/0432/9753/8203/files/wuvidujod.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_off0000e23b.bin` `7ae630080e068d62025955fe10f66f2608446a959016280fb11d3700b0dab70e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE23B	4936 bytes
`font_01_sfnt_off0000f30a.bin` `d22dc33d6bc672b1cdde7028b9eae90437fd4dc80f08f6d6e1a02f107f5fdc0f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF30A	16388 bytes
`font_02_sfnt_off00012500.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12500	4324 bytes

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