Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dedfe9845b11bf9…

MALICIOUS

PDF

48.0 KB Created: 2020-08-12 04:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b080692c4dfa9b828283d2def2d308e6 SHA-1: f499e16539cd065812a7083ea422e97647d89ad1 SHA-256: 3dedfe9845b11bf9491870e04374392a1f9207c26a79b5c787b05229af9baebd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=cortical+blindness+pdf'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL.

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/pify?keyword=cortical+blindness+pdf
    • http://files.coachmo.net/uploads/1/3/2/6/132682093/numiz-robozevololav-bowusefolo-fenan.pdf
    • http://gerofew.the-wandering-eye.com/uploads/1/3/0/7/130738779/75a359a5.pdf
    • http://files.tormonbrothers.com/uploads/1/3/1/3/131384660/016d5.pdf
    • http://gamupiza.lwachanute.com/uploads/1/3/1/4/131453598/d387436341a.pdf
    • http://files.tormonbrothers.com/uploads/1/3/1/3/131384660/016d5.pd
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/xvid_codec_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vufofabiziterefabul.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/55704323350.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/kung_fu_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/noroxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/geduwikowesigosutosujob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://cdn.shopify.com/s/files/1/0454/3774/7350/files/meditation_guide_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/alleluia_alleluia_give_thanks_to_the_risen_lord.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/42465572949.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/wizujurifunomi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3834/9211/files/doki_doki_natsuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/android_editor.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_off00007df8.bin
ffd178f83f99ca5b4f744a183223a6983edd5cf1ed3d8aa395408e02612b6009
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF8 5196 bytes
font_01_sfnt_off00008fa0.bin
b0e7a5be38057b1fdb6b19231104f84cb4ddd98b30c418d773e9e0d2a2375ea6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA0 10448 bytes