Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69a2fa35fe35c85…

MALICIOUS

PDF

53.3 KB Created: 2020-08-06 23:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9caab162e04047333f83b29b81ac4caf SHA-1: 4e3097561f03438c6946b7e168da06d2cd30ea6d SHA-256: b69a2fa35fe35c85c78000f65005dafce9fb92876c9b1e6f2fc112a53699144d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to manipulate search engine results or direct users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Ratner biomaterials science pdf', suggesting a lure to disguise malicious content as legitimate research material.

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=ratner+biomaterials+science+pdf
    • http://files.americancanyonchiropractic.com/uploads/1/3/2/7/132712483/wajosafoli_voxud_xemaxokileboz_guwasuduwas.pdf
    • http://files.soddydaisypediatrics.com/uploads/1/3/1/4/131437285/vubeb.pdf
    • http://files.joinfacet.com/uploads/1/3/1/1/131164573/witejaribadawaj-setovuxixitifa-lapijamaweza-vetasajowexux.pdf
    • http://files.lockedsecurestorage.com/uploads/1/3/0/7/130740174/3806712.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/35026783597.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/bozeruxezozagerusix.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/pukazetubeletatedafofegud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/jogitidisunofu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/usb_read_only.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/43849277197.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/liste_chaine_canalsat_grand_panorama.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/64999528782.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/funaxojurizulalupekerokiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/convertir_de_a_word_reconocimiento_de_texto_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/96408611644.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/lekobuditiboxefofuxip.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.

FilenameKindSourceSize
font_00_sfnt_off00009079.bin
ce809c581ddb8df9f84944c42f453d1137a86de0cc51e82f906918b3996f2300
pdf-font-stream PDF embedded font (sfnt) at offset 0x9079 5448 bytes
font_01_sfnt_off0000a2e9.bin
113533bec31b90ba39b0e39d279c7aee1880f04388bd52651a6f3ffb60636ac2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E9 10948 bytes