Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdaee8bfd3c84fc9…

MALICIOUS

PDF

41.1 KB Created: 2020-08-05 02:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a7f312b4391c5c5c481e38e2d976d3d SHA-1: 06120d9853e5b9b003cf0ee833ead28d6e76b4dd SHA-256: fdaee8bfd3c84fc9fdfb0b882b77060dcc1b3f6490485cc17ff56a298857d4ef
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into clicking on further malicious links. The document body and embedded URLs suggest a lure related to 'Onenote ipad annotate pdf', likely a social engineering tactic to entice clicks. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=onenote+ipad+annotate+pdf
    • http://files.lofiber.com/uploads/1/3/1/8/131871854/tidavup-pirejefew-manufotujo.pdf
    • http://files.atdesignpartners.com/uploads/1/3/0/8/130873908/74ecda240cbb.pdf
    • http://files.finewatergems.com/uploads/1/3/2/8/132816036/wowuzusefexib.pdf
    • http://files.highplainsgymnastics.com/uploads/1/3/1/3/131398250/kosifawofobova_vukizakepuv_vatufojelo_divorofisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/83420545476.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/fuvavav.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/85280862858.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/tabemipotilotebupugos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/17941086160.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/59665378382.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/printable_calendars_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/rawutelufomufazovezugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/xoruwatosurokerepoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/5782484778.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0440/4035/6005/files/tuwebadusivulifikuxi.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_off0000635c.bin
be8a266c1f7c5e29695d407ca14f29ad09a751d9b77b62be77b36d3ca085e926
pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 4756 bytes
font_01_sfnt_off000073a2.bin
34d20a1781a829d2839a51f7fa8e561e33332e2cd00a28b025c1f2ea477aa280
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A2 10516 bytes