Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ddd53bef04cba3…

MALICIOUS

PDF

45.9 KB Created: 2020-07-16 03:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b11faa17816b86f877e11f7977a31d9d SHA-1: cf81ab39eb8a18579405f234450b53b2becb0d6e SHA-256: 97ddd53bef04cba302ab6aa92aecaf53e2b07ea9b82da456def48407986a06d0
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URLs point to domains known for distributing malicious content. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to click on these links, which likely lead to further stages of infection.

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/wb?keyword=algebra%20nation%20pdf
    • http://files.chasemichaelmusic.com/uploads/1/3/1/4/131406843/7a385771ba.pdf
    • http://files.discoelectroson.com/uploads/1/3/1/3/131380814/tekudafe_xiragid.pdf
    • http://files.laurabeardart.net/uploads/1/3/1/4/131409794/nixatafudufavujopa.pdf
    • http://files.fabulous-you.biz/uploads/1/3/1/0/131070149/sukowuruzewalor-nitazipupe-kimimarodojukeb.pdf
    • http://files.stefanibohm.com/uploads/1/3/2/3/132303099/6004173.pdf
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdf
    • http://files.moriahmylod.com/uploads/1/3/1/1/131164157/dopad.pdf
    • https://saxapepe.files.wordpress.com/2020/06/88137524687.pdf
    • https://genonirog922543524.files.wordpress.com/2020/06/66715253628.pdf
    • https://juzuzinon.files.wordpress.com/2020/06/5005814952.pdf
    • https://lamuraxinu.files.wordpress.com/2020/07/fapene.pdf
    • https://gutelum.files.wordpress.com/2020/06/51276987316.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/zomezosimigokurinox.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/punipil.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/nafiwuwipubupiluwup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/71969986921.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/lonurexemiresazololes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/49844597241.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_off000075c8.bin
68d4396c9984b58368ab1a0b34538bcb30994d29cacbb69b2b228d55d4d982bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C8 4948 bytes
font_01_sfnt_off0000869c.bin
982f6b172ffbdeba9eaa7667c7696f19da8e2c51cac8cdc6cd058804cc1d4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x869C 10572 bytes