Malicious PDF — malware analysis report

Static analysis result for SHA-256 af48de6cfa08ba93…

MALICIOUS

PDF

39.9 KB Created: 2020-09-14 18:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f92bca95b705716beffe022e0ee9d3 SHA-1: 0106dfc78fcb159038f4933d4b05e78d39ba7dc4 SHA-256: af48de6cfa08ba93ed7a60c0fe8143c579efdc35fd3e5e165367debcbb02105f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, mentions 'Wish promo code 2020', suggesting a lure to entice users to click the malicious links. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to potentially malicious websites through a link farm.

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.cc/wb?keyword=wish%20promo%20code%202020%20not%20first%20order
    • http://lokodu.salveoclinic.org/uploads/1/3/0/8/130814161/b128dbf6e1ea.pdf
    • http://gasikof.monumentalbeginningsdoula.com/uploads/1/3/2/6/132695601/d8a54.pdf
    • http://files.tmbrepairs.com/uploads/1/3/2/6/132682790/774155.pdf
    • http://rotib.hopewellhub.com/uploads/1/3/2/6/132695671/bitak_vavaje_nurapexuzipi_fanup.pdf
    • http://files.susanmeehan.net/uploads/1/3/0/7/130739616/dofur_rogur.pdf
    • http://files.leggsmanufacturing.com/uploads/1/3/1/3/131383398/tivuwuwodupe.pdf
    • http://files.emergeinmarketing.co.uk/uploads/1/3/1/6/131606331/sesafokel.pdf
    • http://files.jhva.co.uk/uploads/1/3/1/3/131384589/jeviteluzu-fanenubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/81953732681.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/pivedelikixezagu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2018/7805/files/famagalakatikebujabovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2135/files/barron_s_ielts_with_mp3_cd_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/72832558582.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/jabariya_jodi_2019_movie_openload.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/cannot_delete_a_worksheet_in_excel.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.

FilenameKindSourceSize
font_00_sfnt_off000051a5.bin
276e32c08802b89fa1e65628855f5096528bc93d31ba26b684ad19628322cc66
pdf-font-stream PDF embedded font (sfnt) at offset 0x51A5 5228 bytes
font_01_sfnt_off0000634f.bin
9b8d6c0eb448a2bcb83cbbf4210152bd7681a054654ac6e98f07c577b79ef803
pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 9656 bytes
font_02_sfnt_off00008468.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8468 4324 bytes